Publications "Köhler, Anna"

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Article in a journal

Franca, Larissa G. ; Danos, Andrew ; Saxena, Rishabh ; Kuila, Suman ; Stavrou, Kleitos ; Li, Chunyong ; Wedler, Stefan ; Köhler, Anna ; Monkman, Andrew P.:
Exploring the Early Time Behavior of the Excited States of an Archetype Thermally Activated Delayed Fluorescence Molecule.
In: The Journal of Physical Chemistry Letters. Vol. 15 (2024) . - pp. 1734-1740.
ISSN 1948-7185
DOI: https://doi.org/10.1021/acs.jpclett.4c00030

Biberger, Simon ; Spies, Maximilian ; Schötz, Konstantin ; Kahle, Frank-Julian ; Leupold, Nico ; Moos, Ralf ; Grüninger, Helen ; Köhler, Anna ; Panzer, Fabian:
Reactive spin coating based on real-time in situ feedback for improved control of perovskite thin film fabrication.
In: Journal of Materials Chemistry C. Vol. 12 (2024) . - pp. 6415-6422.
ISSN 2050-7534
DOI: https://doi.org/10.1039/D3TC04361D

Witt, Christina ; Schötz, Konstantin ; Köhler, Anna ; Panzer, Fabian:
Understanding Method-Dependent Differences in Urbach Energies in Halide Perovskites.
In: The Journal of Physical Chemistry C. Vol. 128 (2024) Issue 15 . - pp. 6336-6345.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.3c07293

Chen, Xinrui ; Bagnich, Sergey ; Pollice, Robert ; Li, Bing ; Zhu, Yuanyuan ; Saxena, Rishabh ; Yin, Yixiao ; Zhu, Weiguo ; Aspuru-Guzik, Alan ; Zysman-Colman, Eli ; Köhler, Anna ; Wang, Yafei:
Unveiling the TADF Emitters with Apparent Negative Singlet-Triplet Gaps : Implications for Exciton Harvesting and OLED Performance.
In: Advanced Optical Materials. Vol. 12 (2024) Issue 6 . - 2301784.
ISSN 2195-1071
DOI: https://doi.org/10.1002/adom.202301784

Stankevych, Andrei ; Saxena, Rishabh ; Grüne, Jeannine ; Lulei, Sebastian ; Sperlich, Andreas ; Athanasopoulos, Stavros ; Vakhnin, Alexander ; Sahay, Prakhar ; Brütting, Wolfgang ; Dyakonov, Vladimir ; Bässler, Heinz ; Köhler, Anna ; Kadashchuk, Andrey:
Charge-carrier photogeneration in single-component organic carbazole-based semiconductors via low excitation power triplet-triplet annihilation.
In: Physical Review Applied. Vol. 20 (2023) . - 064029.
ISSN 2331-7019
DOI: https://doi.org/10.1103/PhysRevApplied.20.064029

Biberger, Simon ; Leupold, Nico ; Witt, Christina ; Greve, Christopher ; Markus, Paul ; Ramming, Philipp ; Lukas, Daniel ; Schötz, Konstantin ; Kahle, Frank-Julian ; Zhu, Chenhui ; Papastavrou, Georg ; Köhler, Anna ; Herzig, Eva M. ; Moos, Ralf ; Panzer, Fabian:
First of Their Kind : Solar Cells with a Dry-Processed Perovskite Absorber Layer via Powder Aerosol Deposition and Hot-Pressing.
In: Solar RRL. Vol. 7 (2023) Issue 16 . - 2300261.
ISSN 2367-198X
DOI: https://doi.org/10.1002/solr.202300261

Kroh, Daniel ; Athanasopoulos, Stavros ; Nádaždy, Vojtech ; Kahle, Frank-Julian ; Bässler, Heinz ; Köhler, Anna:
An Impedance Study of the Density of States Distribution in Blends of PM6:Y6 in Relation to Barrierless Dissociation of CT States.
In: Advanced Functional Materials. (2023) . - 2302520.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.202302520

Burdakov, Ya. V. ; Saunina, A. Yu. ; Bässler, Heinz ; Köhler, Anna ; Nikitenko, V. R.:
Modeling of charge transport in polymers with embedded crystallites.
In: Physical Review B. Vol. 108 (2023) Issue 8 . - 085301.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.108.085301

Stankevych, Andrei ; Saxena, Rishabh ; Vakhnin, Alexander ; May, Falk ; Kinaret, Naomi ; Andrienko, Denis ; Genoe, Jan ; Bässler, Heinz ; Köhler, Anna ; Kadashchuk, Andrey:
Monitoring the Charge-Carrier-Occupied Density of States in Disordered Organic Semiconductors under Nonequilibrium Conditions Using Thermally Stimulated Luminescence Spectroscopy.
In: Physical Review Applied. Vol. 19 (2023) Issue 5 . - 054007.
ISSN 2331-7019
DOI: https://doi.org/10.1103/PhysRevApplied.19.054007

Duda, Eimantas ; Madayanad Suresh, Subeesh ; Hall, David ; Bagnich, Sergey ; Saxena, Rishabh ; Cordes, David B. ; Slawin, Alexandra M. Z. ; Beljonne, David ; Olivier, Yoann ; Köhler, Anna ; Zysman-Colman, Eli:
An Oligomer Approach for Blue Thermally Activated Delayed Fluorescent Emitters Based on Twisted Donor–Acceptor Units.
In: Chemistry of Materials. Vol. 35 (2023) Issue 5 . - pp. 2027-2037.
ISSN 1520-5002
DOI: https://doi.org/10.1021/acs.chemmater.2c03438

Witt, Christina ; Schötz, Konstantin ; Kuhn, Meike ; Leupold, Nico ; Biberger, Simon ; Ramming, Philipp ; Kahle, Frank-Julian ; Köhler, Anna ; Moos, Ralf ; Herzig, Eva M. ; Panzer, Fabian:
Orientation and Grain Size in MAPbI₃ Thin Films : Influence on Phase Transition, Disorder, and Defects.
In: The Journal of Physical Chemistry C. Vol. 127 (2023) Issue 22 . - pp. 10563-10573.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.2c08968

Schötz, Konstantin ; Panzer, Fabian ; Sommer, Michael ; Bässler, Heinz ; Köhler, Anna:
A spectroscopic assessment of static and dynamic disorder in a film of a polythiophene with a planarized backbone.
In: Materials Horizons. Vol. 10 (2023) Issue 12 . - pp. 5538-5546.
ISSN 2051-6355
DOI: https://doi.org/10.1039/D3MH01262J

Greve, Christopher ; Ramming, Philipp ; Griesbach, Markus ; Leupold, Nico ; Moos, Ralf ; Köhler, Anna ; Herzig, Eva M. ; Panzer, Fabian ; Grüninger, Helen:
To Stop or to Shuttle Halides? The Role of an Ionic Liquid in Thermal Halide Mixing of Hybrid Perovskites.
In: ACS Energy Letters. Vol. 8 (2023) . - pp. 5041-5049.
ISSN 2380-8195
DOI: https://doi.org/10.1021/acsenergylett.3c01878

Duda, Eimantas ; Hall, David ; Bagnich, Sergey ; Carpenter-Warren, Cameron L. ; Saxena, Rishabh ; Wong, Michael Y. ; Cordes, David B. ; Slawin, Alexandra M. Z. ; Beljonne, David ; Olivier, Yoann ; Zysman-Colman, Eli ; Köhler, Anna:
Enhancing Thermally Activated Delayed Fluorescence by Fine-Tuning the Dendron Donor Strength.
In: The Journal of Physical Chemistry B. Vol. 126 (2022) Issue 2 . - pp. 552-562.
ISSN 1520-5207
DOI: https://doi.org/10.1021/acs.jpcb.1c05749

Biberger, Simon ; Schötz, Konstantin ; Ramming, Philipp ; Leupold, Nico ; Moos, Ralf ; Köhler, Anna ; Grüninger, Helen ; Panzer, Fabian:
How the ionic liquid BMIMBF₄ influences the formation and optoelectronic properties of MAPbI₃ thin films.
In: Journal of Materials Chemistry A. Vol. 10 (2022) Issue 35 . - pp. 18038-18049.
ISSN 2050-7496
DOI: https://doi.org/10.1039/D2TA04448J

Kroh, Daniel ; Eller, Fabian ; Schötz, Konstantin ; Wedler, Stefan ; Perdigón-Toro, Lorena ; Freychet, Guillaume ; Wei, Qingya ; Dörr, Maximilian ; Jones, David ; Zou, Yingping ; Herzig, Eva M. ; Neher, Dieter ; Köhler, Anna:
Identifying the Signatures of Intermolecular Interactions in Blends of PM6 with Y6 and N4 Using Absorption Spectroscopy.
In: Advanced Functional Materials. Vol. 32 (2022) Issue 44 . - 2205711.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.202205711

Hochgesang, Adrian ; Biberger, Simon ; Grüne, Jeannine ; Mohanraj, John ; Kahle, Frank-Julian ; Dyakonov, Vladimir ; Köhler, Anna ; Thelakkat, Mukundan:
Intricacies and Mechanism of p-Doping Spiro-MeOTAD Using Cu(TFSI)₂.
In: Advanced Electronic Materials. Vol. 8 (2022) Issue 10 . - 2200113.
ISSN 2199-160X
DOI: https://doi.org/10.1002/aelm.202200113

Nazarenus, Tobias ; Schlesier, Kira ; Biberger, Simon ; Exner, Jörg ; Kita, Jaroslaw ; Köhler, Anna ; Moos, Ralf:
Posttreatment of powder aerosol deposited oxide ceramic films by high power LED.
In: International Journal of Applied Ceramic Technology. Vol. 19 (2022) Issue 3 . - pp. 1540-1553.
ISSN 1744-7402
DOI: https://doi.org/10.1111/ijac.13977

Sun, Dianming ; Saxena, Rishabh ; Fan, Xiaochun ; Athanasopoulos, Stavros ; Duda, Eimantas ; Zhang, Ming ; Bagnich, Sergey ; Zhang, Xiaohong ; Zysman-Colman, Eli ; Köhler, Anna:
Regiochemistry of Donor Dendrons Controls the Performance of Thermally Activated Delayed Fluorescence Dendrimer Emitters for High Efficiency Solution-Processed Organic Light-Emitting Diodes.
In: Advanced Science. Vol. 9 (2022) Issue 20 . - 2201470.
ISSN 2198-3844
DOI: https://doi.org/10.1002/advs.202201470

Kahle, Frank-Julian ; Rudnick, Alexander ; Wedler, Stefan ; Saxena, Rishabh ; Ammenhäuser, Robin ; Scherf, Ullrich ; Bagnich, Sergey ; Bässler, Heinz ; Köhler, Anna:
Static and Dynamic Disorder of Charge Transfer States Probed by Optical Spectroscopy.
In: Advanced Energy Materials. Vol. 12 (2022) Issue 15 . - 2103063.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.202103063

Sun, Dianming ; Duda, Eimantas ; Fan, Xiaochun ; Saxena, Rishabh ; Zhang, Ming ; Bagnich, Sergey ; Zhang, Xiaohong ; Köhler, Anna ; Zysman-Colman, Eli:
Thermally Activated Delayed Fluorescent Dendrimers that Underpin High-Efficiency Host-Free Solution-Processed Organic Light-Emitting Diodes.
In: Advanced Materials. Vol. 34 (2022) Issue 23 . - 2110344.
ISSN 1521-4095
DOI: https://doi.org/10.1002/adma.202110344

Perdigón-Toro, Lorena ; Phuong, Le Quang ; Eller, Fabian ; Freychet, Guillaume ; Saglamkaya, Elifnaz ; Khan, Jafar I. ; Wei, Qingya ; Zeiske, Stefan ; Kroh, Daniel ; Wedler, Stefan ; Köhler, Anna ; Armin, Ardalan ; Laquai, Frédéric ; Herzig, Eva M. ; Zou, Yingping ; Shoaee, Safa ; Neher, Dieter:
Understanding the Role of Order in Y-Series Non-Fullerene Solar Cells to Realize High Open-Circuit Voltages.
In: Advanced Energy Materials. Vol. 12 (2022) Issue 12 . - 2103422.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.202103422

Fishchuk, Ivan I. ; Kadashchuk, Andrey ; Rolin, Cedric ; Bässler, Heinz ; Köhler, Anna ; Heremans, Paul ; Genoe, Jan:
Random band-edge model description of thermoelectricity in high-mobility disordered semiconductors : Application to the amorphous oxide In-Ga-Zn-O.
In: Physical Review B. Vol. 105 (2022) Issue 24 . - 245201.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.105.245201

Stankevych, Andrei ; Vakhnin, Alexander ; Andrienko, Denis ; Paterson, Leanne ; Genoe, Jan ; Fishchuk, Ivan ; Bässler, Heinz ; Köhler, Anna ; Kadashchuk, Andrey:
Density of States of OLED Host Materials from Thermally Stimulated Luminescence.
In: Physical Review Applied. Vol. 15 (2021) Issue 4 . - 044050.
ISSN 2331-7019
DOI: https://doi.org/10.1103/PhysRevApplied.15.044050

Kurz, Hannah ; Schötz, Konstantin ; Papadopoulos, Ilias ; Heinemann, Frank W. ; Maid, Harald ; Guldi, Dirk M. ; Köhler, Anna ; Hörner, Gerald ; Weber, Birgit:
A Fluorescence-Detected Coordination-Induced Spin State Switch.
In: Journal of the American Chemical Society. Vol. 143 (2021) Issue 9 . - pp. 3466-3480.
ISSN 1520-5126
DOI: https://doi.org/10.1021/jacs.0c12568

Meier, Tobias ; Bässler, Heinz ; Köhler, Anna:
The Impact of Grain Boundaries on Charge Transport in Polycrystalline Organic Field-Effect Transistors.
In: Advanced Optical Materials. Vol. 9 (2021) Issue 14 . - 2100115.
ISSN 2195-1071
DOI: https://doi.org/10.1002/adom.202100115

Zhong, Yu ; Seeberger, Dominik ; Herzig, Eva M. ; Köhler, Anna ; Panzer, Fabian ; Li, Cheng ; Hüttner, Sven:
The Impact of Solvent Vapor on the Film Morphology and Crystallization Kinetics of Lead Halide Perovskites during Annealing.
In: ACS Applied Materials & Interfaces. Vol. 13 (2021) Issue 38 . - pp. 45365-45374.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.1c09075

Rodella, Francesco ; Saxena, Rishabh ; Bagnich, Sergey ; Banevičius, Dovydas ; Kreiza, Gediminas ; Athanasopoulos, Stavros ; Juršėnas, Saulius ; Kazlauskas, Karolis ; Köhler, Anna ; Strohriegl, Peter:
Low efficiency roll-off blue TADF OLEDs employing a novel acridine–pyrimidine based high triplet energy host.
In: Journal of Materials Chemistry C. Vol. 9 (2021) Issue 48 . - pp. 17471-17482.
ISSN 2050-7534
DOI: https://doi.org/10.1039/D1TC03598C

Bässler, Heinz ; Kroh, Daniel ; Schauer, Franz ; Nádaždy, Vojtech ; Köhler, Anna:
Mapping the Density of States Distribution of Organic Semiconductors by Employing Energy Resolved–Electrochemical Impedance Spectroscopy.
In: Advanced Functional Materials. Vol. 31 (2021) Issue 9 . - 2007738.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.202007738

Saxena, Rishabh ; Fishchuk, I. I. ; Nikitenko, V. R. ; Burdakov, Ya. V. ; Metel, Yu. V. ; Genoe, Jan ; Bässler, Heinz ; Köhler, Anna ; Kadashchuk, A.:
Role of the reorganization energy for charge transport in disordered organic semiconductors.
In: Physical Review B. Vol. 103 (2021) Issue 16 . - 165202.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.103.165202

Hall, David ; Rajamalli, Pachaiyappan ; Duda, Eimantas ; Suresh, Subeesh Madayanad ; Rodella, Francesco ; Bagnich, Sergey ; Carpenter-Warren, Cameron L. ; Cordes, David B. ; Slawin, Alexandra M. Z. ; Strohriegl, Peter ; Beljonne, David ; Köhler, Anna ; Olivier, Yoann ; Zysman-Colman, Eli:
Substitution Effects on a New Pyridylbenzimidazole Acceptor for Thermally Activated Delayed Fluorescence and Their Use in Organic Light-Emitting Diodes.
In: Advanced Optical Materials. Vol. 9 (2021) Issue 20 . - 2100846.
ISSN 2195-1071
DOI: https://doi.org/10.1002/adom.202100846

Ramming, Philipp ; Leupold, Nico ; Schötz, Konstantin ; Köhler, Anna ; Moos, Ralf ; Grüninger, Helen ; Panzer, Fabian:
Suppressed ion migration in powder-based perovskite thick films using an ionic liquid.
In: Journal of Materials Chemistry C. Vol. 9 (2021) Issue 35 . - pp. 11827-11837.
ISSN 2050-7534
DOI: https://doi.org/10.1039/D1TC01554K

Raišys, Steponas ; Adomėnienė, Ona ; Adomėnas, Povilas ; Rudnick, Alexander ; Köhler, Anna ; Kazlauskas, Karolis:
Triplet Exciton Diffusion and Quenching in Matrix-Free Solid Photon Upconversion Films.
In: The Journal of Physical Chemistry C. Vol. 125 (2021) Issue 7 . - pp. 3764-3775.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.0c11048

Suresh, Subeesh Madayanad ; Duda, Eimantas ; Hall, David ; Yao, Zhen ; Bagnich, Sergey ; Slawin, Alexandra M. Z. ; Bässler, Heinz ; Beljonne, David ; Buck, Manfred ; Olivier, Yoann ; Köhler, Anna ; Zysman-Colman, Eli:
A Deep Blue B,N-Doped Heptacene Emitter That Shows Both Thermally Activated Delayed Fluorescence and Delayed Fluorescence by Triplet–Triplet Annihilation.
In: Journal of the American Chemical Society. Vol. 142 (2020) Issue 14 . - pp. 6588-6599.
ISSN 1520-5126
DOI: https://doi.org/10.1021/jacs.9b13704

Schötz, Konstantin ; Askar, Abdelrahman M. ; Peng, Wei ; Seeberger, Dominik ; Gujar, Tanaji P. ; Thelakkat, Mukundan ; Köhler, Anna ; Hüttner, Sven ; Bakr, Osman M. ; Shankar, Karthik ; Panzer, Fabian:
Double peak emission in lead halide perovskites by self-absorption.
In: Journal of Materials Chemistry C. Vol. 8 (2020) Issue 7 . - pp. 2289-2300.
ISSN 2050-7534
DOI: https://doi.org/10.1039/C9TC06251C

Feng, Jiale ; Yang, Lupeng ; Romanov, Alexander S. ; Ratanapreechachai, Jirawit ; Reponen, Antti‐Pekka M. ; Jones, Saul T. E. ; Linnolahti, Mikko ; Hele, Timothy J. H. ; Köhler, Anna ; Bässler, Heinz ; Bochmann, Manfred ; Credgington, Dan:
Environmental Control of Triplet Emission in Donor–Bridge–Acceptor Organometallics.
In: Advanced Functional Materials. Vol. 30 (2020) Issue 9 . - 1908715.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.201908715

Rodella, Francesco ; Bagnich, Sergey ; Duda, Eimantas ; Meier, Tobias ; Kahle, Frank-Julian ; Athanasopoulos, Stavros ; Köhler, Anna ; Strohriegl, Peter:
High Triplet Energy Host Materials for Blue TADF OLEDs : A Tool Box Approach.
In: Frontiers in Chemistry. Vol. 8 (2020) . - 657.
ISSN 2296-2646
DOI: https://doi.org/10.3389/fchem.2020.00657

Hall, David ; Suresh, Subeesh Madayanad ; dos Santos, Paloma L. ; Duda, Eimantas ; Bagnich, Sergey ; Pershin, Anton ; Rajamalli, Pachaiyappan ; Cordes, David B. ; Slawin, Alexandra M. Z. ; Beljonne, David ; Köhler, Anna ; Samuel, Ifor D. W. ; Olivier, Yoann ; Zysman‐Colman, Eli:
Improving Processability and Efficiency of Resonant TADF Emitters : a Design Strategy.
In: Advanced Optical Materials. Vol. 8 (2020) Issue 2 . - 1901627.
ISSN 2195-1071
DOI: https://doi.org/10.1002/adom.201901627

Schmode, Philip ; Schötz, Konstantin ; Dolynchuk, Oleksandr ; Panzer, Fabian ; Köhler, Anna ; Thurn-Albrecht, Thomas ; Thelakkat, Mukundan:
Influence of ω-Bromo Substitution on Structure and Optoelectronic Properties of Homopolymers and Gradient Copolymers of 3-Hexylthiophene.
In: Macromolecules. Vol. 53 (2020) Issue 7 . - pp. 2474-2484.
ISSN 1520-5835
DOI: https://doi.org/10.1021/acs.macromol.0c00352

Schötz, Konstantin ; Askar, Abdelrahman M. ; Köhler, Anna ; Shankar, Karthik ; Panzer, Fabian:
Investigating the Tetragonal-to-Orthorhombic Phase Transition of Methylammonium Lead Iodide Single Crystals by Detailed Photoluminescence Analysis.
In: Advanced Optical Materials. Vol. 8 (2020) Issue 17 . - 2000455.
ISSN 2195-1071
DOI: https://doi.org/10.1002/adom.202000455

Chauhan, Mihirsinh ; Zhong, Yu ; Schötz, Konstantin ; Tripathi, Brijesh ; Köhler, Anna ; Hüttner, Sven ; Panzer, Fabian:
Investigating two-step MAPbI₃ thin film formation during spin coating by simultaneous in situ absorption and photoluminescence spectroscopy.
In: Journal of Materials Chemistry A. Vol. 8 (2020) Issue 10 . - pp. 5086-5094.
ISSN 2050-7496
DOI: https://doi.org/10.1039/C9TA12409H

Schönfeld, Sophie ; Dankhoff, Katja ; Baabe, Dirk ; Zaretzke, Marc-Kevin ; Bröring, Martin ; Schötz, Konstantin ; Köhler, Anna ; Hörner, Gerald ; Weber, Birgit:
Iron(II) Spin Crossover Complexes Based on a Redox Active Equatorial Schiff-Base-Like Ligand.
In: Inorganic Chemistry. Vol. 59 (2020) Issue 12 . - pp. 8320-8333.
ISSN 1520-510X
DOI: https://doi.org/10.1021/acs.inorgchem.0c00725

Saxena, Rishabh ; Meier, Tobias ; Athanasopoulos, Stavros ; Bässler, Heinz ; Köhler, Anna:
Kinetic Monte Carlo Study of Triplet-Triplet Annihilation in Conjugated Luminescent Materials.
In: Physical Review Applied. Vol. 14 (2020) Issue 3 . - 034050.
ISSN 2331-7019
DOI: https://doi.org/10.1103/PhysRevApplied.14.034050

Zhang, Zhen ; Kumar, Shiv ; Bagnich, Sergey ; Spuling, Eduard ; Hundemer, Fabian ; Nieger, Martin ; Hassan, Zahid ; Köhler, Anna ; Zysman-Colman, Eli ; Bräse, Stefan:
OBO-Fused Benzo[fg]tetracene as Acceptor With Potential for Thermally Activated Delayed Fluorescence Emitters.
In: Frontiers in Chemistry. Vol. 8 (2020) . - 563411.
ISSN 2296-2646
DOI: https://doi.org/10.3389/fchem.2020.563411

Liao, Xiaojian ; Kahle, Frank-Julian ; Liu, Bin ; Bässler, Heinz ; Zhang, Xinghong ; Köhler, Anna ; Greiner, Andreas:
Polarized blue photoluminescence of mesoscopically ordered electrospun non-conjugated polyacrylonitrile nanofibers.
In: Materials Horizons. Vol. 7 (2020) Issue 6 . - pp. 1605-1612.
ISSN 2051-6355
DOI: https://doi.org/10.1039/D0MH00002G

Wedler, Stefan ; Zhou, Cheng ; Bazan, Guillermo C. ; Panzer, Fabian ; Köhler, Anna:
Role of Torsional Flexibility in the Film Formation Process in Two π-Conjugated Model Oligomers.
In: The Journal of Physical Chemistry Letters. Vol. 11 (2020) . - pp. 9379-9386.
ISSN 1948-7185
DOI: https://doi.org/10.1021/acs.jpclett.0c02778

Wollmann, Julia ; Kahle, Frank-Julian ; Bauer, Irene ; Köhler, Anna ; Strohriegl, Peter:
Versatile Approach to Well-Defined Oligofluorenes and Polyfluorenes with Low Dispersity.
In: Macromolecules. Vol. 53 (2020) Issue 22 . - pp. 10137-10146.
ISSN 1520-5835
DOI: https://doi.org/10.1021/acs.macromol.0c01887

Wedler, Stefan ; Bourdick, Axel ; Athanasopoulos, Stavros ; Gekle, Stephan ; Panzer, Fabian ; McDowell, Caitlin ; Nguyen, Thuc-Quyen ; Bazan, Guillermo C. ; Köhler, Anna:
What is the role of planarity and torsional freedom for aggregation in a π-conjugated donor–acceptor model oligomer?
In: Journal of Materials Chemistry C. Vol. 8 (2020) Issue 14 . - pp. 4944-4955.
ISSN 2050-7534
DOI: https://doi.org/10.1039/D0TC00217H

Yurash, Brett ; Leifert, Dirk ; Reddy, G. N. Manjunatha ; Cao, David Xi ; Biberger, Simon ; Brus, Viktor V. ; Seifrid, Martin ; Santiago, Peter J. ; Köhler, Anna ; Chmelka, Bradley F. ; Bazan, Guillermo C. ; Nguyen, Thuc-Quyen:
Atomic-Level Insight into the Postsynthesis Band Gap Engineering of a Lewis Base Polymer Using Lewis Acid Tris(pentafluorophenyl)borane.
In: Chemistry of Materials. Vol. 31 (2019) Issue 17 . - pp. 6715-6725.
ISSN 1520-5002
DOI: https://doi.org/10.1021/acs.chemmater.9b01224

Vladimirov, Ilja ; Müller, Sebastian ; Baumann, Roelf-Peter ; Geßner, Thomas ; Molla, Zahra ; Grigorian, Souren ; Köhler, Anna ; Bässler, Heinz ; Pietsch, Ullrich ; Weitz, Ralf Thomas:
Dielectric–Semiconductor Interface Limits Charge Carrier Motion at Elevated Temperatures and Large Carrier Densities in a High‐Mobility Organic Semiconductor.
In: Advanced Functional Materials. Vol. 29 (2019) Issue 12 . - 1807867.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.201807867

Leupold, Nico ; Schötz, Konstantin ; Cacovich, Stefania ; Bauer, Irene ; Schultz, Maximilian ; Daubinger, Monika ; Kaiser, Leah ; Rebai, Amelle ; Rousset, Jean ; Köhler, Anna ; Schulz, Philip ; Moos, Ralf ; Panzer, Fabian:
High Versatility and Stability of Mechanochemically Synthesized Halide Perovskite Powders for Optoelectronic Devices.
In: ACS Applied Materials & Interfaces. Vol. 11 (2019) Issue 33 . - pp. 30259-30268.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.9b09160

Kahle, Frank-Julian ; Hahn, Tobias ; Mukhopadhyay, Tushita ; Puttaraju, Boregowda ; Patil, Satish ; Köhler, Anna:
Organic Bidirectional Phototransistors Based on Diketopyrrolopyrrole and Fullerene.
In: Advanced Functional Materials. Vol. 29 (2019) Issue 21 . - 1805684.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.201805684

Reichenberger, Markus ; Kroh, Daniel ; Matrone, Giovanni M. M. ; Schötz, Konstantin ; Pröller, Stephan ; Filonik, Oliver ; Thordardottir, Margret E. ; Herzig, Eva M. ; Bässler, Heinz ; Stingelin, Natalie ; Köhler, Anna:
Controlling aggregate formation in conjugated polymers by spin-coating below the critical temperature of the disorder-order transition.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 56 (2018) Issue 6 . - pp. 532-542.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.24562

Raithel, Dominic ; Simine, Lena ; Pickel, Sebastian ; Schötz, Konstantin ; Panzer, Fabian ; Baderschneider, Sebastian ; Schiefer, Daniel ; Lohwasser, Ruth H. ; Köhler, Jürgen ; Thelakkat, Mukundan ; Sommer, Michael ; Köhler, Anna ; Rossky, Peter J. ; Hildner, Richard:
Direct observation of backbone planarization via side-chain alignment in single bulky-substituted polythiophenes.
In: Proceedings of the National Academy of Sciences of the United States of America. Vol. 115 (2018) Issue 11 . - pp. 2699-2704.
ISSN 1091-6490
DOI: https://doi.org/10.1073/pnas.1719303115

Kahle, Frank-Julian ; Saller, Christina ; Olthof, Selina ; Li, Cheng ; Lebert, Jenny ; Weiß, Sebastian ; Herzig, Eva M. ; Hüttner, Sven ; Meerholz, Klaus ; Strohriegl, Peter ; Köhler, Anna:
Does Electron Delocalization Influence Charge Separation at Donor–Acceptor Interfaces in Organic Photovoltaic Cells?
In: The Journal of Physical Chemistry C. Vol. 122 (2018) Issue 38 . - pp. 21792-21802.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.8b06429

Milward, Jonathan D. ; Marcus, Max ; Köhler, Anna ; Barford, William:
Extracting structural information from MEH-PPV optical spectra.
In: The Journal of Chemical Physics. Vol. 149 (2018) . - 044903.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.5041938

Saller, Christina ; Kahle, Frank-Julian ; Müller, Thomas ; Hahn, Tobias ; Tscheuschner, Steffen ; Priadko, Denys ; Strohriegl, Peter ; Bässler, Heinz ; Köhler, Anna:
Facile Method for the Investigation of Temperature-Dependent C₆₀ Diffusion in Conjugated Polymers.
In: ACS Applied Materials & Interfaces. Vol. 10 (2018) Issue 25 . - pp. 21499-21509.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.8b05520

Kahle, Frank-Julian ; Rudnick, Alexander ; Bässler, Heinz ; Köhler, Anna:
How to interpret absorption and fluorescence spectra of charge transfer states in an organic solar cell.
In: Materials Horizons. Vol. 5 (2018) Issue 5 . - pp. 837-848.
ISSN 2051-6355
DOI: https://doi.org/10.1039/C8MH00564H

Meier, Tobias ; Gujar, Tanaji P. ; Schönleber, Andreas ; Olthof, Selina ; Meerholz, Klaus ; van Smaalen, Sander ; Panzer, Fabian ; Thelakkat, Mukundan ; Köhler, Anna:
Impact of excess PbI₂ on the structure and the temperature dependent optical properties of methylammonium lead iodide perovskites.
In: Journal of Materials Chemistry C. Vol. 6 (2018) Issue 28 . - pp. 7512-7519.
ISSN 2050-7534
DOI: https://doi.org/10.1039/C8TC02237B

Bourdick, Axel ; Reichenberger, Markus ; Stradomska, Anna ; Bazan, Guillermo C. ; Nguyen, Thuc-Quyen ; Köhler, Anna ; Gekle, Stephan:
lucidating Aggregation Pathways in the Donor–Acceptor Type Molecules p-DTS(FBTTh₂)₂ and p-SIDT(FBTTh₂)₂.
In: The Journal of Physical Chemistry B. Vol. 122 (2018) Issue 39 . - pp. 9191-9201.
ISSN 1520-5207
DOI: https://doi.org/10.1021/acs.jpcb.8b06283

Kadashchuk, Andrey ; Janneck, Robby ; Tong, Fei ; Fishchuk, Ivan I. ; Mityashin, Alexander ; Pavlica, Egon ; Köhler, Anna ; Heremans, Paul ; Rolin, Cedric ; Bratina, Gvido ; Genoe, Jan:
Negative field-dependent charge mobility in crystalline organic semiconductors with delocalized transport.
In: Chemical Papers. Vol. 72 (2018) Issue 7 . - pp. 1685-1695.
ISSN 1336-9075
DOI: https://doi.org/10.1007/s11696-018-0483-x

Gujar, Tanaji P. ; Unger, Thomas ; Schönleber, Andreas ; Fried, Martina ; Panzer, Fabian ; van Smaalen, Sander ; Köhler, Anna ; Thelakkat, Mukundan:
The role of PbI2 in CH3NH3PbI3 perovskite stability, solar cell parameters and device degradation.
In: Physical Chemistry Chemical Physics. Vol. 20 (2018) Issue 1 . - pp. 605-614.
ISSN 1463-9084
DOI: https://doi.org/10.1039/C7CP04749E

Lochenie, Charles ; Schötz, Konstantin ; Panzer, Fabian ; Kurz, Hannah ; Maier, Bernadette ; Puchtler, Florian ; Agarwal, Seema ; Köhler, Anna ; Weber, Birgit:
Spin-Crossover Iron(II) Coordination Polymer with Fluorescent Properties : Correlation between Emission Properties and Spin State.
In: Journal of the American Chemical Society. Vol. 140 (2018) Issue 2 . - pp. 700-709.
ISSN 1520-5126
DOI: https://doi.org/10.1021/jacs.7b10571

Marcus, Max ; Milward, Jonathan D. ; Köhler, Anna ; Barford, William:
Structural Information for Conjugated Polymers from Optical Modeling.
In: The Journal of Physical Chemistry A. Vol. 122 (2018) Issue 14 . - pp. 3621-3625.
ISSN 1520-5215
DOI: https://doi.org/10.1021/acs.jpca.8b01585

Fishchuk, Ivan I. ; Bässler, Heinz ; Köhler, Anna ; Genoe, Jan ; Kadashchuk, Andrey:
Unraveling the Role of Multiphonon Excitations and Disorder Concerning the Meyer-Neldel Type Compensation Effect in Organic Semiconductors.
In: Physical Review Applied. Vol. 10 (2018) Issue 5 . - 054063.
ISSN 2331-7019
DOI: https://doi.org/10.1103/PhysRevApplied.10.054063

Hildner, Richard ; Köhler, Anna ; Müller-Buschbaum, Peter ; Panzer, Fabian ; Thelakkat, Mukundan:
π-Conjugated Donor Polymers : Structure Formation and Morphology in Solution, Bulk and Photovoltaic Blends.
In: Advanced Energy Materials. Vol. 7 (2017) Issue 16 . - 1700314.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.201700314

Kahle, Frank-Julian ; Saller, Christina ; Köhler, Anna ; Strohriegl, Peter:
Crosslinked Semiconductor Polymers for Photovoltaic Applications.
In: Advanced Energy Materials. Vol. 7 (2017) Issue 16 . - 1700306.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.201700306

Athanasopoulos, Stavros ; Tscheuschner, Steffen ; Bässler, Heinz ; Köhler, Anna:
Efficient Charge Separation of Cold Charge-Transfer States in Organic Solar Cells Through Incoherent Hopping.
In: The Journal of Physical Chemistry Letters. Vol. 8 (2017) Issue 9 . - pp. 2093-2098.
ISSN 1948-7185
DOI: https://doi.org/10.1021/acs.jpclett.7b00595

Wilma, Kevin ; Unger, Thomas ; Kostakoğlu, Sinem Tuncel ; Hollfelder, Manuel ; Hunger, Christoph ; Lang, Andreas ; Gurek, Ayse Gul ; Thelakkat, Mukundan ; Köhler, Jürgen ; Köhler, Anna ; Gekle, Stephan ; Hildner, Richard:
Excited State Dynamics and Conformations of a Cu(II)-Phthalocyanine-Perylenebisimide Dyad.
In: Physical Chemistry Chemical Physics. Vol. 19 (2017) Issue 33 . - pp. 22169-22176.
ISSN 1463-9084
DOI: https://doi.org/10.1039/C7CP04026A

Mukhopadhyay, Tushita ; Puttaraju, Boregowda ; Roy, Palas ; Dasgupta, Jyotishman ; Meyer, Andreas ; Rudnick, Alexander ; Tscheuschner, Steffen ; Kahle, Frank-Julian ; Köhler, Anna ; Patil, Satish:
Facile Synthesis and Chain-Length Dependence of the Optical and Structural Properties of Diketopyrrolopyrrole-Based Oligomers.
In: Chemistry : a European Journal. Vol. 23 (2017) Issue 55 . - pp. 13718-13723.
ISSN 1521-3765
DOI: https://doi.org/10.1002/chem.201702131

Unger, Thomas ; Wedler, Stefan ; Kahle, Frank-Julian ; Scherf, Ullrich ; Bässler, Heinz ; Köhler, Anna:
The Impact of Driving Force and Temperature on the Electron Transfer in Donor–Acceptor Blend Systems.
In: The Journal of Physical Chemistry C. Vol. 121 (2017) Issue 41 . - pp. 22739-22752.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.7b09213

Panzer, Fabian ; Li, Cheng ; Meier, Tobias ; Köhler, Anna ; Hüttner, Sven:
Impact of Structural Dynamics on the Optical Properties of Methylammonium Lead Iodide Perovskites.
In: Advanced Energy Materials. Vol. 7 (2017) Issue 16 . - 1700286.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.201700286

Kahle, Frank-Julian ; Bauer, Irene ; Strohriegl, Peter ; Köhler, Anna:
Influence of Crosslinking on Charge Carrier Mobility in Crosslinkable Polyfluorene Derivatives.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 55 (2017) Issue 1 . - pp. 112-120.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.24259

Rudnick, Alexander ; Kass, Kim-Julia ; Preis, Eduard ; Scherf, Ullrich ; Bässler, Heinz ; Köhler, Anna:
Interplay of localized pyrene chromophores and π−conjugation in novel poly(2,7- pyrene) ladder polymers.
In: The Journal of Chemical Physics. Vol. 146 (2017) . - 174903.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.4982046

Hahn, Tobias ; Tscheuschner, Steffen ; Kahle, Frank-Julian ; Reichenberger, Markus ; Athanasopoulos, Stavros ; Saller, Christina ; Bazan, Guillermo C. ; Nguyen, Thuc-Quyen ; Strohriegl, Peter ; Bässler, Heinz ; Köhler, Anna:
Monomolecular and Bimolecular Recombination of Electron–Hole Pairs at the Interface of a Bilayer Organic Solar Cell.
In: Advanced Functional Materials. Vol. 27 (2017) Issue 1 . - 1604906.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.201604906

Kadashchuk, Andrey ; Tong, Fei ; Janneck, Robby ; Fishchuk, Ivan I. ; Mityashin, Alexander ; Pavlica, Egon ; Köhler, Anna ; Heremans, Paul ; Rolin, Cedric ; Bratina, Gvido ; Genoe, Jan:
Role of transport band edge variation on delocalized charge transport in high-mobility crystalline organic semiconductors.
In: Physical Review B. Vol. 96 (2017) Issue 12 . - 125202.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.96.125202

Rudnick, Alexander ; Wetzel, Christoph ; Tscheuschner, Steffen ; Schmalz, Holger ; Vogt, Astrid ; Greiner, Andreas ; Bässler, Heinz ; Mena-Osteritz, Elena ; Bäuerle, Peter ; Köhler, Anna:
Spectroscopic Study of Thiophene–Pyrrole-Containing S,N-Heteroheptacenes Compared to Acenes and Phenacenes.
In: The Journal of Physical Chemistry B. Vol. 121 (2017) Issue 31 . - pp. 7492-7501.
ISSN 1520-5207
DOI: https://doi.org/10.1021/acs.jpcb.7b02935

Panzer, Fabian ; Bässler, Heinz ; Köhler, Anna:
Temperature Induced Order–Disorder Transition in Solutions of Conjugated Polymers Probed by Optical Spectroscopy.
In: The Journal of Physical Chemistry Letters. Vol. 8 (2017) . - pp. 114-125.
ISSN 1948-7185
DOI: https://doi.org/10.1021/acs.jpclett.6b01641

Wetzel, Christoph ; Vogt, Astrid ; Rudnick, Alexander ; Mena-Osteritz, Elena ; Köhler, Anna ; Bäuerle, Peter:
Thiophene–pyrrole containing S,N-heteroheptacenes : synthesis, and optical and electrochemical characterisation.
In: Organic Chemistry Frontiers. Vol. 4 (2017) Issue 8 . - pp. 1629-1635.
ISSN 2052-4129
DOI: https://doi.org/10.1039/c7qo00294g

Panzer, Fabian ; Hanft, Dominik ; Gujar, Tanaji P. ; Kahle, Frank-Julian ; Thelakkat, Mukundan ; Köhler, Anna ; Moos, Ralf:
Compact Layers of Hybrid Halide Perovskites Fabricated via the Aerosol Deposition Process : Uncoupling Material Synthesis and Layer Formation.
In: Materials. Vol. 9 (2016) Issue 4 . - 277.
ISSN 1996-1944
DOI: https://doi.org/10.3390/ma9040277

Reichenberger, Markus ; Love, John A. ; Rudnick, Alexander ; Bagnich, Sergey ; Panzer, Fabian ; Stradomska, Anna ; Bazan, Guillermo C. ; Nguyen, Thuc-Quyen ; Köhler, Anna:
The effect of intermolecular interaction on excited states in p − DTS(FBTTH₂)₂.
In: The Journal of Chemical Physics. Vol. 144 (2016) Issue 7 . - 074904.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.4941700

Singh, Shivam ; Li, Cheng ; Panzer, Fabian ; Narasimhan, K. L. ; Gräser, Anna ; Gujar, Tanaji P. ; Köhler, Anna ; Thelakkat, Mukundan ; Hüttner, Sven ; Kabra, Dinesh:
Effect of Thermal and Structural Disorder on the Electronic Structure of Hybrid Perovskite Semiconductor CH₃NH₃PbI₃.
In: The Journal of Physical Chemistry Letters. Vol. 7 (2016) . - pp. 3014-3021.
ISSN 1948-7185
DOI: https://doi.org/10.1021/acs.jpclett.6b01207

Li, Cheng ; Zhong, Yu ; Melo Luna, Carlos Andres ; Unger, Thomas ; Deichsel, Konstantin ; Gräser, Anna ; Köhler, Jürgen ; Köhler, Anna ; Hildner, Richard ; Hüttner, Sven:
Emission Enhancement and Intermittency in Polycrystalline Organolead Halide Perovskite Films.
In: Molecules. Vol. 21 (2016) Issue 8 . - 1081.
ISSN 1420-3049
DOI: https://doi.org/10.3390/molecules21081081

Rudnick, Alexander ; Bagnich, Sergey ; Wagner, Daniel ; Athanasopoulos, Stavros ; Strohriegl, Peter ; Köhler, Anna:
The influence of torsion on excimer formation in bipolar host materials for blue phosphorescent OLEDs.
In: The Journal of Chemical Physics. Vol. 144 (2016) Issue 21 . - 214906.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.4953102

Knauer, Philipp ; Hahn, Tobias ; Köhler, Anna ; Strohriegl, Peter:
Initiator-free crosslinking of oxetane functionalized low bandgap polymers : an approach towards stabilized bulk heterojunction solar cells.
In: Journal of Materials Chemistry C. Vol. 4 (2016) Issue 43 . - pp. 10347-10357.
ISSN 2050-7534
DOI: https://doi.org/10.1039/c6tc03214a

Fishchuk, Ivan I. ; Kadashchuk, Andrey ; Bhoolokam, A. ; de Jamblinne de Meux, A. ; Pourtois, G. ; Gavrilyuk, M. M. ; Köhler, Anna ; Bässler, Heinz ; Heremans, Paul ; Genoe, Jan:
Interplay between hopping and band transport in high-mobility disordered semiconductors at large carrier concentrations : the case of the amorphous oxide InGaZnO.
In: Physical Review B. Vol. 93 (2016) Issue 19 . - 195204.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.93.195204

Li, Cheng ; Tscheuschner, Steffen ; Paulus, Fabian ; Hopkinson, Paul E. ; Kießling, Johannes ; Köhler, Anna ; Vaynzof, Yana ; Hüttner, Sven:
Iodine Migration and its Effect on Hysteresis in Perovskite Solar Cells.
In: Advanced Materials. Vol. 28 (2016) Issue 12 . - pp. 2446-2454.
ISSN 1521-4095
DOI: https://doi.org/10.1002/adma.201503832

Panzer, Fabian ; Baderschneider, Sebastian ; Gujar, Tanaji P. ; Unger, Thomas ; Bagnich, Sergey ; Jakoby, Marius ; Bässler, Heinz ; Hüttner, Sven ; Köhler, Jürgen ; Moos, Ralf ; Thelakkat, Mukundan ; Hildner, Richard ; Köhler, Anna:
Reversible Laser-Induced Amplified Spontaneous Emission from Coexisting Tetragonal and Orthorhombic Phases in Hybrid Lead Halide Perovskites.
In: Advanced Optical Materials. Vol. 4 (2016) Issue 6 . - pp. 917-928.
ISSN 2195-1071
DOI: https://doi.org/10.1002/adom.201500765

Hahn, Tobias ; Tscheuschner, Steffen ; Saller, Christina ; Strohriegl, Peter ; Boregowda, Puttarraju ; Mukhopadhyay, Tushita ; Patil, Satish ; Neher, Dieter ; Bässler, Heinz ; Köhler, Anna:
Role of Intrinsic Photogeneration in Single Layer and Bilayer Solar Cells with C60 and PCBM.
In: The Journal of Physical Chemistry C. Vol. 120 (2016) Issue 43 . - pp. 25083-25091.
ISSN 1932-7455
DOI: https://doi.org/10.1021/acs.jpcc.6b08471

Rahman, Md. Mostafizur ; Younus, Muhammad ; Naher, Masnun ; Masud, Mostafa Kamal ; Nomoto, Akihiro ; Ogawa, Akiya ; Rudnick, Alexander ; Köhler, Anna:
Synthesis, spectroscopic characterization, thermal and luminescent properties of new organosulfur-functionalized platinum(II) bis (alkenylarylalkynyl) complexes.
In: Journal of Organometallic Chemistry. Vol. 818 (2016) . - pp. 185-194.
ISSN 0022-328X
DOI: https://doi.org/10.1016/j.jorganchem.2016.06.006

Reichenberger, Markus ; Baderschneider, Sebastian ; Kroh, Daniel ; Grauf, Steffen ; Köhler, Jürgen ; Hildner, Richard ; Köhler, Anna:
Watching Paint Dry : The Impact of Diiodooctane on the Kinetics of Aggregate Formation in Thin Films of Poly(3-hexylthiophene).
In: Macromolecules. Vol. 49 (2016) Issue 17 . - pp. 6420-6430.
ISSN 1520-5835
DOI: https://doi.org/10.1021/acs.macromol.6b01257

Tscheuschner, Steffen ; Bässler, Heinz ; Huber, Katja ; Köhler, Anna:
A Combined Theoretical and Experimental Study of Dissociation of Charge Transfer States at the Donor–Acceptor Interface of Organic Solar Cells.
In: The Journal of Physical Chemistry B. Vol. 119 (2015) Issue 32 . - pp. 10359-10371.
ISSN 1520-5207
DOI: https://doi.org/10.1021/acs.jpcb.5b05138

Hahn, Tobias ; Geiger, Johannes ; Blase, Xavier ; Duchemin, Ivan ; Niedzialek, Dorota ; Tscheuschner, Steffen ; Beljonne, David ; Bässler, Heinz ; Köhler, Anna:
Does Excess Energy Assist Photogeneration in an Organic Low-Bandgap Solar Cell?
In: Advanced Functional Materials. Vol. 25 (2015) Issue 8 . - pp. 1287-1295.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.201403784

Bagnich, Sergey ; Athanasopoulos, Stavros ; Rudnick, Alexander ; Schrögel, Pamela ; Bauer, Irene ; Greenham, Neil C. ; Strohriegl, Peter ; Köhler, Anna:
Excimer Formation by Steric Twisting in Carbazole and Triphenylamine-Based Host Materials.
In: The Journal of Physical Chemistry C. Vol. 119 (2015) Issue 5 . - pp. 2380-2387.
ISSN 1932-7455
DOI: https://doi.org/10.1021/jp512772j

Bässler, Heinz ; Köhler, Anna:
"Hot or cold" : how do charge transfer states at the donor–acceptor interface of an organic solar cell dissociate?
In: Physical Chemistry Chemical Physics. Vol. 17 (2015) Issue 43 . - pp. 28451-28462.
ISSN 1463-9084
DOI: https://doi.org/10.1039/C5CP04110D

Hahn, Tobias ; Saller, Christina ; Weigl, M. ; Bauer, Irene ; Unger, Thomas ; Köhler, Anna ; Strohriegl, Peter:
Organic solar cells with crosslinked polymeric exciton blocking layer.
In: Physica Status Solidi A. Vol. 212 (2015) Issue 10 . - pp. 2162-2168.
ISSN 1521-396X
DOI: https://doi.org/10.1002/pssa.201532040

Consani, Cristina ; Koch, Federico ; Panzer, Fabian ; Unger, Thomas ; Köhler, Anna ; Brixner, Tobias:
Relaxation dynamics and exciton energy transfer in the low-temperature phase of MEH-PPV.
In: The Journal of Chemical Physics. Vol. 142 (2015) Issue 21 . - 212429.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.4918645

Scharsich, Christina ; Fischer, Florian S. U. ; Wilma, Kevin ; Hildner, Richard ; Ludwigs, Sabine ; Köhler, Anna:
Revealing structure formation in PCPDTBT by optical spectroscopy.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 53 (2015) Issue 20 . - pp. 1416-1430.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.23780

Panzer, Fabian ; Sommer, Michael ; Bässler, Heinz ; Thelakkat, Mukundan ; Köhler, Anna:
Spectroscopic Signature of Two Distinct H-Aggregate Species in Poly(3-hexylthiophene).
In: Macromolecules. Vol. 48 (2015) Issue 5 . - pp. 1543-1553.
ISSN 1520-5835
DOI: https://doi.org/10.1021/acs.macromol.5b00129

Bagnich, Sergey ; Rudnick, Alexander ; Schrögel, Pamela ; Strohriegl, Peter ; Köhler, Anna:
Triplet energies and excimer formation in meta- and para-linked carbazolebiphenyl matrix materials.
In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. Vol. 373 (2015) Issue 2044 . - 20140446.
ISSN 1471-2962
DOI: https://doi.org/10.1098/rsta.2014.0446

Unger, Thomas ; Panzer, Fabian ; Consani, Cristina ; Koch, Federico ; Brixner, Tobias ; Bässler, Heinz ; Köhler, Anna:
Ultrafast Energy Transfer between Disordered and Highly Planarized Chains of Poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV).
In: ACS Macro Letters. Vol. 4 (2015) Issue 4 . - pp. 412-416.
ISSN 2161-1653
DOI: https://doi.org/10.1021/acsmacrolett.5b00133

Schwarz, Christian ; Milan, Felix ; Hahn, Tobias ; Reichenberger, Markus ; Kümmel, Stephan ; Köhler, Anna:
Ground State Bleaching at Donor–Acceptor Interfaces.
In: Advanced Functional Materials. Vol. 24 (2014) Issue 41 . - pp. 6439-6448.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.201400297

Panzer, Fabian ; Bässler, Heinz ; Lohwasser, Ruth ; Thelakkat, Mukundan ; Köhler, Anna:
The Impact of Polydispersity and Molecular Weight on the Order–Disorder Transition in Poly(3-hexylthiophene).
In: The Journal of Physical Chemistry Letters. Vol. 5 (2014) Issue 15 . - pp. 2742-2747.
ISSN 1948-7185
DOI: https://doi.org/10.1021/jz5009938

Neumann, Katharina ; Schwarz, Christian ; Köhler, Anna ; Thelakkat, Mukundan:
Influence of the Excited-State Charge-Transfer Character on the Exciton Dissociation in Donor–Acceptor Copolymers.
In: The Journal of Physical Chemistry C. Vol. 118 (2014) Issue 1 . - pp. 27-36.
ISSN 1932-7455
DOI: https://doi.org/10.1021/jp407014q

Fischer, Florian ; Hahn, Tobias ; Bässler, Heinz ; Bauer, Irene ; Strohriegl, Peter ; Köhler, Anna:
Measuring Reduced C60 Diffusion in Crosslinked Polymer Films by Optical Spectroscopy.
In: Advanced Functional Materials. Vol. 24 (2014) Issue 39 . - pp. 6172-6177.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.201401153

Fishchuk, Ivan I. ; Kadashchuk, Andrey ; Mityashin, Alexander ; Gavrilyuk, M. M. ; Köhler, Anna ; Bässler, Heinz ; Genoe, Jan ; Sitter, H. ; Sariciftci, N. S.:
Origin of Meyer-Neldel type compensation behavior in organic semiconductors at large carrier concentrations : Disorder versus thermodynamic description.
In: Physical Review B. Vol. 90 (2014) Issue 24 . - 245201.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.90.245201

Ling, Jun ; Zheng, Zhicheng ; Köhler, Anna ; Müller, Axel H. E.:
Rod-Like Nano-Light Harvester.
In: Macromolecular Rapid Communications. Vol. 35 (2014) Issue 1 . - pp. 52-55.
ISSN 1521-3927
DOI: https://doi.org/10.1002/marc.201300785

Haedler, Andreas T. ; Misslitz, Holger ; Bühlmeyer, Christian ; Albuquerque, Rodrigo Q. ; Köhler, Anna ; Schmidt, Hans-Werner:
Controlling the π-Stacking Behavior of Pyrene Derivatives : Influence of H-Bonding and Steric Effects in Different States of Aggregation.
In: ChemPhysChem. Vol. 14 (2013) Issue 9 . - pp. 1818-1829.
ISSN 1439-4235
DOI: https://doi.org/10.1002/cphc.201300242

Hoffmann, Sebastian T. ; Jaiser, Frank ; Hayer, Anna ; Bässler, Heinz ; Unger, Thomas ; Athanasopoulos, Stavros ; Neher, Dieter ; Köhler, Anna:
How Do Disorder, Reorganization, and Localization Influence the Hole Mobility in Conjugated Copolymers?
In: Journal of the American Chemical Society. Vol. 135 (2013) Issue 5 . - pp. 1772-1782.
ISSN 1520-5126
DOI: https://doi.org/10.1021/ja308820j

Yamagata, Hajime ; Hestand, Nicholas J. ; Spano, Frank C. ; Köhler, Anna ; Scharsich, Christina ; Hoffmann, Sebastian T. ; Bässler, Heinz:
The red-phase of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) : A disordered HJ-aggregate.
In: The Journal of Chemical Physics. Vol. 139 (2013) Issue 11 . - 114903.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.4819906

Schwarz, Christian ; Tscheuschner, Steffen ; Frisch, Johannes ; Winkler, Stefanie ; Koch, Norbert ; Bässler, Heinz ; Köhler, Anna:
Role of the effective mass and interfacial dipoles on exciton dissociation in organic donor-acceptor solar cells.
In: Physical Review B. Vol. 87 (2013) Issue 15 . - 155205.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.87.155205

Athanasopoulos, Stavros ; Hoffmann, Sebastian T. ; Bässler, Heinz ; Köhler, Anna ; Beljonne, David:
To Hop or Not to Hop? Understanding the Temperature Dependence of Spectral Diffusion in Organic Semiconductors.
In: The Journal of Physical Chemistry Letters. Vol. 4 (2013) Issue 10 . - pp. 1694-1700.
ISSN 1948-7185
DOI: https://doi.org/10.1021/jz400480a

Wagner, Daniel ; Hoffmann, Sebastian T. ; Heinemeyer, Ute ; Münster, Ingo ; Köhler, Anna ; Strohriegl, Peter:
Triazine Based Bipolar Host Materials for Blue Phosphorescent OLEDs.
In: Chemistry of Materials. Vol. 25 (2013) Issue 18 . - pp. 3758-3765.
ISSN 1520-5002
DOI: https://doi.org/10.1021/cm4023216

Fishchuk, Ivan I. ; Kadashchuk, Andrey ; Hoffmann, Sebastian T. ; Athanasopoulos, Stavros ; Genoe, Jan ; Bässler, Heinz ; Köhler, Anna:
Unified description for hopping transport in organic semiconductors including both energetic disorder and polaronic contributions.
In: Physical Review B. Vol. 88 (2013) Issue 12 . - 125202.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.88.125202

Scharsich, Christina ; Lohwasser, Ruth H. ; Sommer, Michael ; Asawapirom, Udom ; Scherf, Ullrich ; Thelakkat, Mukundan ; Neher, Dieter ; Köhler, Anna:
Control of aggregate formation in poly(3-hexylthiophene) by solvent, molecular weight, and synthetic method.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 50 (2012) Issue 6 . - pp. 442-453.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.23022

Schwarz, Christian ; Bässler, Heinz ; Bauer, Irene ; Koenen, Jan-Moritz ; Preis, Eduard ; Scherf, Ullrich ; Köhler, Anna:
Does Conjugation Help Exciton Dissociation? A Study on Poly(p-phenylene)s in Planar Heterojunctions with C60 or TNF.
In: Advanced Materials. Vol. 24 (2012) Issue 7 . - pp. 922-925.
ISSN 1521-4095
DOI: https://doi.org/10.1002/adma.201104063

Hoffmann, Sebastian T. ; Athanasopoulos, Stavros ; Beljonne, David ; Bässler, Heinz ; Köhler, Anna:
How do Triplets and Charges Move in Disordered Organic Semiconductors? A Monte Carlo Study Comprising the Equilibrium and Nonequilibrium Regime.
In: The Journal of Physical Chemistry C. Vol. 116 (2012) Issue 31 . - pp. 16371-16383.
ISSN 1932-7455
DOI: https://doi.org/10.1021/jp305062p

Hayer, Anna ; van Regemorter, Tanguy ; Höfer, Bianca ; Mak, Chris S. K. ; Beljonne, David ; Köhler, Anna:
On the formation mechanism for electrically generated exciplexes in a carbazole–pyridine copolymer.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 50 (2012) Issue 5 . - pp. 361-369.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.23011

Köhler, Anna ; Hoffmann, Sebastian T. ; Bässler, Heinz:
An Order–Disorder Transition in the Conjugated Polymer MEH-PPV.
In: Journal of the American Chemical Society. Vol. 134 (2012) Issue 28 . - pp. 11594-11601.
ISSN 1520-5126
DOI: https://doi.org/10.1021/ja302408a

Köhler, Anna:
Organic semiconductors : no more breaks for electrons.
In: Nature Materials. Vol. 11 (2012) Issue 10 . - pp. 836-837.
ISSN 1476-4660
DOI: https://doi.org/10.1038/nmat3427

Köhler, Anna ; Khan, Amena L. T. ; Wilson, Joanne S. ; Dosche, Carsten ; Al-Suti, Mohammed K. ; Shah, Hakikulla H. ; Khan, Muhammad S.:
The role of C-H and C-C stretching modes in the intrinsic non-radiative decay of triplet states in a Pt-containing conjugated phenylene ethynylene.
In: The Journal of Chemical Physics. Vol. 136 (2012) Issue 9 . - 094905.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.3691105

Stöcker, Thomas ; Köhler, Anna ; Moos, Ralf:
Why does the electrical conductivity in PEDOT:PSS decrease with PSS content? A study combining thermoelectric measurements with impedance spectroscopy.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 50 (2012) Issue 14 . - pp. 976-983.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.23089

Albuquerque, Rodrigo Q. ; Hofmann, Christiane C. ; Köhler, Jürgen ; Köhler, Anna:
Diffusion-Limited Energy Transfer in Blends of Oligofluorenes with an Anthracene Derivative.
In: The Journal of Physical Chemistry B. Vol. 115 (2011) Issue 25 . - pp. 8063-8070.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp202333w

Herrmann, Daniel ; Niesar, Sabrina ; Scharsich, Christina ; Köhler, Anna ; Stutzmann, Martin ; Riedle, Eberhard:
Role of Structural Order and Excess Energy on Ultrafast Free Charge Generation in Hybrid Polythiophene/Si Photovoltaics Probed in Real Time by Near-Infrared Broadband Transient Absorption.
In: Journal of the American Chemical Society. Vol. 133 (2011) Issue 45 . - pp. 18220-18233.
ISSN 1520-5126
DOI: https://doi.org/10.1021/ja207887q

Schrögel, Pamela ; Tomkevičienė, Aušra ; Strohriegl, Peter ; Hoffmann, Sebastian T. ; Köhler, Anna ; Lennartz, Christian:
A series of CBP-derivatives as host materials for blue phosphorescent organic light-emitting diodes.
In: Journal of Materials Chemistry. Vol. 21 (2011) Issue 7 . - pp. 2266-2273.
ISSN 1364-5501
DOI: https://doi.org/10.1039/C0JM03321A

Khan, Muhammad S. ; Al-Suti, Mohammed K. ; Shah, Hakikulla H. ; Al-Humaimi, Said ; Al-Battashi, Fathiya R. ; Bjernemose, Jens K. ; Male, Louise ; Raithby, Paul R. ; Zhang, Ning ; Köhler, Anna ; Warren, John E.:
Synthesis and characterization of platinum(II) di-ynes and poly-ynes incorporating ethylenedioxythiophene (EDOT) spacers in the backbone.
In: Dalton Transactions. Vol. 40 (2011) . - pp. 10174-10183.
ISSN 1477-9234
DOI: https://doi.org/10.1039/C1DT11010A

Hoffmann, Sebastian T. ; Schrögel, Pamela ; Rothmann, Michael ; Albuquerque, Rodrigo Q. ; Strohriegl, Peter ; Köhler, Anna:
Triplet Excimer Emission in a Series of 4,4′-Bis(N-carbazolyl)-2,2′-biphenyl Derivatives.
In: The Journal of Physical Chemistry B. Vol. 115 (2011) Issue 3 . - pp. 414-421.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp107408e

Hoffmann, Sebastian T. ; Koenen, Jan-Moritz ; Scherf, Ullrich ; Bauer, Irene ; Strohriegl, Peter ; Bässler, Heinz ; Köhler, Anna:
Triplet–Triplet Annihilation in a Series of Poly(p-phenylene) Derivatives.
In: The Journal of Physical Chemistry B. Vol. 115 (2011) Issue 26 . - pp. 8417-8423.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp202763e

Köhler, Anna ; Bässler, Heinz:
What controls triplet exciton transfer in organic semiconductors?
In: Journal of Materials Chemistry. Vol. 21 (2011) Issue 12 . - pp. 4003-4011.
ISSN 1364-5501
DOI: https://doi.org/10.1039/C0JM02886J

Thesen, Manuel W. ; Höfer, Bianca ; Debeaux, Marc ; Janietz, Silvia ; Wedel, Armin ; Köhler, Anna ; Johannes, Hans-Hermann ; Krüger, Hartmut:
Hole-transporting host-polymer series consisting of triphenylamine basic structures for phosphorescent polymer light-emitting diodes.
In: Journal of Polymer Science Part A: Polymer Chemistry. Vol. 48 (2010) Issue 15 . - pp. 3417-3430.
ISSN 0360-6376
DOI: https://doi.org/10.1002/pola.24127

Hoffmann, Sebastian T. ; Bässler, Heinz ; Koenen, Jan-Moritz ; Forster, Michael ; Scherf, Ullrich ; Scheler, Esther ; Strohriegl, Peter ; Köhler, Anna:
Spectral diffusion in poly(para-phenylene)-type polymers with different energetic disorder.
In: Physical Review B. Vol. 81 (2010) Issue 11 . - 115103.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.81.115103

Hoffmann, Sebastian T. ; Scheler, Esther ; Koenen, Jan-Moritz ; Forster, Michael ; Scherf, Ullrich ; Strohriegl, Peter ; Bässler, Heinz ; Köhler, Anna:
Triplet energy transfer in conjugated polymers. III. An experimental assessment regarding the influence of disorder on polaronic transport.
In: Physical Review B. Vol. 81 (2010) Issue 16 . - 165208.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.81.165208

Hoffmann, Sebastian T. ; Bässler, Heinz ; Köhler, Anna:
What Determines Inhomogeneous Broadening of Electronic Transitions in Conjugated Polymers?
In: The Journal of Physical Chemistry B. Vol. 114 (2010) Issue 51 . - pp. 17037-17048.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp107357y

Devi, Lekshmi Sudha ; Al-Suti, Mohammed K. ; Zhang, Ning ; Teat, Simon J. ; Male, Louise ; Sparkes, Hazel A. ; Raithby, Paul R. ; Khan, Muhammad S. ; Köhler, Anna:
Synthesis and Comparison of the Optical Properties of Platinum(II) Poly-ynes with Fused and Non-Fused Oligothiophenes.
In: Macromolecules. Vol. 42 (2009) Issue 4 . - pp. 1131-1141.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma802399a

Köhler, Anna ; Bässler, Heinz:
Triplet states in organic semiconductors.
In: Materials Science and Engineering: R: Reports. Vol. 66 (2009) Issue 4/6 . - pp. 71-109.
ISSN 0927-796X
DOI: https://doi.org/10.1016/j.mser.2009.09.001

Aharon, Eyal ; Breuer, Steffen ; Jaiser, Frank ; Köhler, Anna ; Frey, Gitti L.:
Effect of the Solvent on the Conformation of Isolated MEH-PPV Chains Intercalated Into SnS2.
In: ChemPhysChem. Vol. 9 (2008) Issue 10 . - pp. 1430-1436.
ISSN 1439-4235
DOI: https://doi.org/10.1002/cphc.200800109

Schütz, Christoph ; Höfer, Bianca ; Jaiser, Frank ; Krüger, Hartmut ; Thesen, Manuel W. ; Janietz, Silvia ; Köhler, Anna:
Exciton dynamics in blends of phosphorescent emitters.
In: Physica Status Solidi B. Vol. 245 (2008) Issue 5 . - pp. 810-813.
ISSN 1521-3951
DOI: https://doi.org/10.1002/pssb.200743441

Devi, Lekshmi Sudha ; Al-Suti, Mohammed K. ; Dosche, Carsten ; Khan, Muhammad S. ; Friend, Richard H. ; Köhler, Anna:
Triplet energy transfer in conjugated polymers. I. Experimental investigation of a weakly disordered compound.
In: Physical Review B. Vol. 78 (2008) Issue 4 . - 045210.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.78.045210

Fishchuk, Ivan I. ; Kadashchuk, Andrey ; Devi, Lekshmi Sudha ; Heremans, Paul ; Bässler, Heinz ; Köhler, Anna:
Triplet energy transfer in conjugated polymers. II. A polaron theory description addressing the influence of disorder.
In: Physical Review B. Vol. 78 (2008) Issue 4 . - 045211.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.78.045211

Parkinson, P. ; Aharon, Eyal ; Chang, M. H. ; Dosche, Carsten ; Frey, Gitti L. ; Köhler, Anna ; Herz, Laura M.:
Dimensionality-dependent energy transfer in polymer-intercalated SnS2 nanocomposites.
In: Physical Review B. Vol. 75 (2007) Issue 16 . - 165206.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.75.165206

Zhang, Ning ; Hayer, Anna ; Al-Suti, Mohammed K. ; Al-Belushi, Rayya A. ; Khan, Muhammad S. ; Köhler, Anna:
The effect of delocalization on the exchange energy in meta- and para-linked Pt-containing carbazole polymers and monomers.
In: The Journal of Chemical Physics. Vol. 124 (2006) Issue 24 . - 244701.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.2200351

Hayer, Anna ; de Halleux, Véronique ; Köhler, Anna ; El-Garoughy, Abdel ; Meijer, Egbert W. ; Barberá, Joaquin ; Tant, Julien ; Levin, Jeremy ; Lehmann, Matthias ; Gierschner, Johannes ; Cornil, Jérôme ; Geerts, Yves:
Highly Fluorescent Crystalline and Liquid Crystalline Columnar Phases of Pyrene-Based Structures.
In: The Journal of Physical Chemistry B. Vol. 110 (2006) Issue 15 . - pp. 7653-7659.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp0573689

Evans, Nicholas R. ; Devi, Lekshmi Sudha ; Mak, Chris S. K. ; Watkins, Scott E. ; Pascu, Sofia I. ; Köhler, Anna ; Friend, Richard H. ; Williams, Charlotte K. ; Holmes, Andrew B.:
Triplet Energy Back Transfer in Conjugated Polymers with Pendant Phosphorescent Iridium Complexes.
In: Journal of the American Chemical Society. Vol. 128 (2006) Issue 20 . - pp. 6647-6656.
ISSN 1520-5126
DOI: https://doi.org/10.1021/ja0584267

Mak, Chris S. K. ; Hayer, Anna ; Pascu, Sofia I. ; Watkins, Scott E. ; Holmes, Andrew B. ; Köhler, Anna ; Friend, Richard H.:
Blue-to-green electrophosphorescence of iridium-based cyclometallated materials.
In: Chemical Communications. (2005) Issue 37 . - pp. 4708-4710.
ISSN 1364-548X
DOI: https://doi.org/10.1039/B508695G

Mermer, Ö. ; Veeraraghavan, G. ; Francis, T. L. ; Sheng, Y. ; Nguyen, D. T. ; Wohlgenannt, M. ; Köhler, Anna ; Al-Suti, Mohammed K. ; Khan, Muhammad S.:
Large magnetoresistance in nonmagnetic π-conjugated semiconductor thin film devices.
In: Physical Review B. Vol. 72 (2005) Issue 20 . - 205202.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.72.205202

Hayer, Anna ; Khan, Amena L. T. ; Friend, Richard H. ; Köhler, Anna:
Morphology dependence of the triplet excited state formation and absorption in polyfluorene.
In: Physical Review B. Vol. 71 (2005) Issue 24 . - 241302(R).
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.71.241302

Khan, Amena L. T. ; Sreearunothai, Paiboon ; Herz, Laura M. ; Banach, Michael J. ; Köhler, Anna:
Morphology-dependent energy transfer within polyfluorene thin films.
In: Physical Review B. Vol. 69 (2004) Issue 8 . - 085201.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.69.085201

Hayer, Anna ; Köhler, Anna ; Arisi, E. ; Bergenti, I. ; Dediu, A. ; Taliani, C. ; Al-Suti, Mohammed K. ; Khan, Muhammad S.:
Polymer light-emitting diodes with spin-polarised charge injection.
In: Synthetic Metals. Vol. 147 (2004) . - pp. 155-158.
ISSN 0379-6779
DOI: https://doi.org/10.1016/j.synthmet.2004.06.031

Köhler, Anna ; Beljonne, David:
The Singlet–Triplet Exchange Energy in Conjugated Polymers.
In: Advanced Functional Materials. Vol. 14 (2004) Issue 1 . - pp. 11-18.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.200305032

Sandee, Albertus J. ; Williams, Charlotte K. ; Evans, Nicholas R. ; Davies, John E. ; Boothby, Clare E. ; Köhler, Anna ; Friend, Richard H. ; Holmes, Andrew B.:
Solution-Processible Conjugated Electrophosphorescent Polymers.
In: Journal of the American Chemical Society. Vol. 126 (2004) Issue 22 . - pp. 7041-7048.
ISSN 1520-5126
DOI: https://doi.org/10.1021/ja039445o

Yang, C. ; Vardeny, Z. V. ; Köhler, Anna ; Wohlgenannt, M. ; Al-Suti, Mohammed K. ; Khan, Muhammad S.:
Spectroscopic study of spin-dependent exciton formation rates in π-conjugated semiconductors: Comparison with electroluminescence techniques.
In: Physical Review B. Vol. 70 (2004) Issue 24 . - 241202(R).
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.70.241202

Khan, Muhammad S. ; Al-Mandhary, Muna R. A. ; Al-Suti, Mohammed K. ; Al-Battashi, Fathiya R. ; Al-Saadi, Sultan ; Ahrens, Birte ; Bjernemose, Jens K. ; Mahon, Mary F. ; Raithby, Paul R. ; Younus, Muhammad ; Chawdhury, Nazia ; Köhler, Anna ; Marseglia, Elizabeth A. ; Tedesco, Emilio ; Feeder, Neil ; Teat, Simon J.:
Synthesis, characterisation and optical spectroscopy of platinum(II) di-ynes and poly-ynes incorporating condensed aromatic spacers in the backbone.
In: Dalton Transactions. (2004) Issue 15 . - pp. 2377-2385.
ISSN 1477-9234
DOI: https://doi.org/10.1039/B405070C

Khan, Amena L. T. ; Banach, Michael J. ; Köhler, Anna:
Control of β-phase formation in polyfluorene thin films via Franck–Condon analysis.
In: Synthetic Metals. Vol. 139 (2003) Issue 3 . - pp. 905-907.
ISSN 0379-6779
DOI: https://doi.org/10.1016/S0379-6779(03)00244-3

Brown, Peter J. ; Thomas, D. Steve ; Köhler, Anna ; Wilson, Joanne S. ; Kim, Ji-Seon ; Ramsdale, Catherine M. ; Sirringhaus, Henning ; Friend, Richard H.:
Effect of interchain interactions on the absorption and emission of poly(3-hexylthiophene).
In: Physical Review B. Vol. 67 (2003) Issue 6 . - 064203.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.67.064203

Johnston, Michael B. ; Herz, Laura M. ; Khan, Amena L. T. ; Köhler, Anna ; Davies, A. G. ; Linfield, E. H.:
Low-energy vibrational modes in phenylene oligomers studied by THz time-domain spectroscopy.
In: Chemical Physics Letters. Vol. 377 (2003) Issue 1-2 . - pp. 256-262.
ISSN 1873-4448
DOI: https://doi.org/10.1016/S0009-2614(03)01136-9

Köhler, Anna ; Wilson, Joanne S.:
Phosphorescence and spin-dependent exciton formation in conjugated polymers.
In: Organic Electronics. Vol. 4 (2003) Issue 2-3 . - pp. 179-189.
ISSN 1566-1199
DOI: https://doi.org/10.1016/j.orgel.2003.08.011

Wilson, Joanne S. ; Wilson, R. J. ; Friend, Richard H. ; Köhler, Anna ; Al-Suti, Mohammed K. ; Al-Mandhary, Muna R. A. ; Khan, Muhammad S.:
Polarization of singlet and triplet excited states in a platinum-containing conjugated polymer.
In: Physical Review B. Vol. 67 (2003) Issue 12 . - 125206.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.67.125206

Khan, Muhammad S. ; Al-Suti, Mohammed K. ; Al-Mandhary, Muna R. A. ; Ahrens, Birte ; Bjernemose, Jens K. ; Mahon, Mary F. ; Male, Louise ; Raithby, Paul R. ; Friend, Richard H. ; Köhler, Anna ; Wilson, Joanne S.:
Synthesis and characterisation of new acetylide-functionalised aromatic and hetero-aromatic ligands and their dinuclear platinum complexes.
In: Dalton Transactions. (2003) Issue 1 . - pp. 65-73.
ISSN 1477-9234
DOI: https://doi.org/10.1039/B208494E

Khan, Muhammad S. ; Al-Mandhary, Muna R. A. ; Al-Suti, Mohammed K. ; Corcoran, Timothy C. ; Al-Mahrooqi, Yaqoub ; Attfield, J. Paul ; Feeder, Neil ; David, William I. F. ; Shankland, Kenneth ; Friend, Richard H. ; Köhler, Anna ; Marseglia, Elizabeth A. ; Tedesco, Emilio ; Tang, Chiu C. ; Raithby, Paul R. ; Collings, Jonathan C. ; Roscoe, Karl P. ; Batsanov, Andrei S. ; Stimson, Lorna M. ; Marder, Todd B.:
Synthesis and optical characterisation of platinum(II) poly-yne polymers incorporating substituted 1,4-diethynylbenzene derivatives and an investigation of the intermolecular interactions in the diethynylbenzene molecular precursors.
In: New Journal of Chemistry. Vol. 27 (2003) Issue 1 . - pp. 140-149.
ISSN 1369-9261
DOI: https://doi.org/10.1039/B206946F

Khan, Muhammad S. ; Al-Mandhary, Muna R. A. ; Al-Suti, Mohammed K. ; Ahrens, Birte ; Mahon, Mary F. ; Male, Louise ; Raithby, Paul R. ; Boothby, Clare E. ; Köhler, Anna:
Synthesis, characterisation and optical spectroscopy of diynes and poly-ynes containing derivatised fluorenes in the backbone.
In: Dalton Transactions. (2003) Issue 1 . - pp. 74-84.
ISSN 1477-9234
DOI: https://doi.org/10.1039/B208963G

Köhler, Anna ; Wilson, Joanne S. ; Friend, Richard H.:
Fluorescence and Phosphorescence in Organic Materials.
In: Advanced Engineering Materials. Vol. 4 (2002) Issue 7 . - pp. 453-459.
ISSN 1527-2648
DOI: https://doi.org/10.1002/1527-2648(20020717)4:7<453::AID-ADEM453>3.0.CO;2-G

Köhler, Anna ; Wilson, Joanne S. ; Friend, Richard H. ; Al-Suti, Mohammed K. ; Khan, Muhammad S. ; Gerhard, A. ; Bässler, Heinz:
The singlet–triplet energy gap in organic and Pt-containing phenylene ethynylene polymers and monomers.
In: The Journal of Chemical Physics. Vol. 116 (2002) Issue 21 . - pp. 9457-9463.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.1473194

Khan, Muhammad S. ; Al-Mandhary, Muna R. A. ; Al-Suti, Mohammed K. ; Hisahm, Abdul Khader ; Raithby, Paul R. ; Ahrens, Birte ; Mahon, Mary F. ; Male, Louise ; Marseglia, Elizabeth A. ; Tedesco, Emilio ; Friend, Richard H. ; Köhler, Anna ; Feeder, Neil ; Teat, Simon J.:
Structural characterisation of a series of acetylide-functionalised oligopyridines and the synthesis, characterisation and optical spectroscopy of platinum di-ynes and poly-ynes containing oligopyridyl linker groups in the backbone.
In: Dalton Transactions. (2002) Issue 7 . - pp. 1358-1368.
ISSN 1477-9234
DOI: https://doi.org/10.1039/B110658A

Khan, Muhammad S. ; Al-Mandhary, Muna R. A. ; Al-Suti, Mohammed K. ; Feeder, Neil ; Nahar, Saifun ; Köhler, Anna ; Friend, Richard H. ; Wilson, Paul J. ; Raithby, Paul R.:
Synthesis, characterisation and electronic properties of a series of platinum(II) poly-ynes containing novel thienyl-pyridine linker groups.
In: Dalton Transactions. (2002) Issue 12 . - pp. 2441-2448.
ISSN 1477-9234
DOI: https://doi.org/10.1039/B201073A

Wilson, Joanne S. ; Chawdhury, Nazia ; Al-Mandhary, Muna R. A. ; Younus, Muhammad ; Khan, Muhammad S. ; Raithby, Paul R. ; Köhler, Anna ; Friend, Richard H.:
The Energy Gap Law for Triplet States in Pt-Containing Conjugated Polymers and Monomers.
In: Journal of the American Chemical Society. Vol. 123 (2001) Issue 38 . - pp. 9412-9417.
ISSN 1520-5126
DOI: https://doi.org/10.1021/ja010986s

Wilson, Joanne S. ; Dhoot, A. S. ; Seeley, A. J. A. B. ; Khan, Muhammad S. ; Köhler, Anna ; Friend, Richard H.:
Spin-dependent exciton formation in pi-conjugated compounds.
In: Nature. Vol. 413 (2001) . - pp. 828-831.
ISSN 1476-4687
DOI: https://doi.org/10.1038/35101565

Wilson, Joanne S. ; Köhler, Anna ; Friend, Richard H. ; Al-Suti, Mohammed K. ; Al-Mandhary, Muna R. A. ; Khan, Muhammad S. ; Raithby, Paul R.:
Triplet states in a series of Pt-containing ethynylenes.
In: The Journal of Chemical Physics. Vol. 113 (2000) Issue 17 . - pp. 7627-7634.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.1313527

Köhler, Anna ; Younus, Muhammad ; Al-Mandhary, Muna R. A. ; Raithby, Paul R. ; Khan, Muhammad S. ; Friend, Richard H.:
Donor-acceptor interactions in organometallic and organic poly-ynes.
In: Synthetic Metals. Vol. 101 (1999) Issue 1-3 . - pp. 246-247.
ISSN 0379-6779
DOI: https://doi.org/10.1016/S0379-6779(98)01360-5

Chawdhury, Nazia ; Köhler, Anna ; Friend, Richard H. ; Wong, W.-Y. ; Lewis, Jack ; Younus, Muhammad ; Raithby, Paul R. ; Corcoran, Timothy C. ; Al-Mandhary, Muna R. A. ; Khan, Muhammad S.:
Evolution of lowest singlet and triplet excited states with number of thienyl rings in platinum poly-ynes.
In: The Journal of Chemical Physics. Vol. 110 (1999) Issue 10 . - pp. 4963-4970.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.478382

Köhler, Anna ; dos Santos, D. A. ; Beljonne, David ; Shuai, Z. ; Bredas, J.-L. ; Holmes, Andrew B. ; Kraus, Andreas ; Müllen, Klaus ; Friend, Richard H.:
Charge separation in localized and delocalized electronic states in polymeric semiconductors.
In: Nature. Vol. 392 (1998) . - pp. 903-906.
ISSN 1476-4687
DOI: https://doi.org/10.1038/31901

Chawdhury, Nazia ; Köhler, Anna ; Friend, Richard H. ; Younus, Muhammad ; Long, Nicholas J. ; Raithby, Paul R. ; Lewis, Jack:
Synthesis and Electronic Structure of Platinum-Containing Poly-ynes with Aromatic and Heteroaromatic Rings.
In: Macromolecules. Vol. 31 (1998) Issue 3 . - pp. 722-727.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma971267u

Younus, Muhammad ; Köhler, Anna ; Cron, Stephane ; Chawdhury, Nazia ; Al-Mandhary, Muna R. A. ; Khan, Muhammad S. ; Lewis, Jack ; Long, Nicholas J. ; Friend, Richard H. ; Raithby, Paul R.:
Synthesis, Electrochemistry, and Spectroscopy of Blue Platinum(II) Polyynes and Diynes.
In: Angewandte Chemie International Edition. Vol. 37 (1998) Issue 21 . - pp. 3036-3039.
ISSN 1521-3773
DOI: https://doi.org/10.1002/(SICI)1521-3773(19981116)37:21<3036::AID-ANIE3036>3.0.CO;2-R

Friend, Richard H. ; Denton, G. J. ; Halls, J. J. M. ; Harrison, N. T. ; Holmes, Andrew B. ; Köhler, Anna ; Lux, A. ; Moratti, S. C. ; Pichler, K. ; Tessler, N. ; Towns, K. ; Wittmann, H. F.:
Electronic excitations in luminescent conjugated polymers.
In: Solid State Communications. Vol. 102 (1997) Issue 2-3 . - pp. 249-258.
ISSN 1879-2766
DOI: https://doi.org/10.1016/S0038-1098(96)00715-6

Friend, Richard H. ; Denton, G. J. ; Halls, J. J. M. ; Harrison, N. T. ; Holmes, Andrew B. ; Köhler, Anna ; Lux, A. ; Moratti, S. C. ; Pichler, K. ; Tessler, N. ; Towns, K.:
Electronic Processes of Conjugated Polymers in Semiconductor Device Structures.
In: Synthetic Metals. Vol. 84 (1997) Issue 1-3 . - pp. 463-470.
ISSN 0379-6779
DOI: https://doi.org/10.1016/S0379-6779(97)80830-2

Köhler, Anna ; dos Santos, D. A. ; Beljonne, David ; Shuai, Z. ; Bredas, J.-L. ; Friend, Richard H. ; Moratti, S. C. ; Holmes, Andrew B.:
UV photocurrent spectroscopy in poly(p-phenylene vinylene) and derivatives.
In: Synthetic Metals. Vol. 84 (1997) Issue 1-3 . - pp. 675-676.
ISSN 0379-6779
DOI: https://doi.org/10.1016/S0379-6779(96)04104-5

Köhler, Anna ; Wittmann, H. F. ; Friend, Richard H. ; Khan, Muhammad S. ; Lewis, Jack:
Enhanced photocurrent response in photocells made with platinum-poly-yne/C60 blends by photoinduced electron transfer.
In: Synthetic Metals. Vol. 77 (1996) Issue 1-3 . - pp. 147-150.
ISSN 0379-6779
DOI: https://doi.org/10.1016/0379-6779(96)80076-2

Beljonne, David ; Wittmann, H. F. ; Köhler, Anna ; Graham, S. ; Younus, Muhammad ; Lewis, Jack ; Raithby, Paul R. ; Khan, Muhammad S. ; Friend, Richard H. ; Bredas, J.-L.:
Spatial extent of the singlet and triplet excitons in transition metal‐containing poly‐ynes.
In: The Journal of Chemical Physics. Vol. 105 (1996) Issue 9 . - pp. 3868-3877.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.472207

Cervini, R. ; Holmes, Andrew B. ; Moratti, S. C. ; Köhler, Anna ; Friend, Richard H.:
Synthesis of new conjugated thiophene polymers.
In: Synthetic Metals. Vol. 76 (1996) Issue 1-3 . - pp. 169-171.
ISSN 0379-6779
DOI: https://doi.org/10.1016/0379-6779(95)03445-P

Köhler, Anna ; Grüner, J. ; Friend, Richard H. ; Müllen, Klaus ; Scherf, Ullrich:
Photocurrent measurements on aggregates in ladder-type poly(p-phenylene).
In: Chemical Physics Letters. Vol. 243 (1995) Issue 5-6 . - pp. 456-461.
ISSN 1873-4448
DOI: https://doi.org/10.1016/0009-2614(95)00840-Z

Köhler, Anna ; Wittmann, H. F. ; Friend, Richard H. ; Khan, Muhammad S. ; Lewis, Jack:
The photovoltaic effect in a platinum poly-yne.
In: Synthetic Metals. Vol. 67 (1994) Issue 1-3 . - pp. 245-249.
ISSN 0379-6779
DOI: https://doi.org/10.1016/0379-6779(94)90050-7

Article in a book

Strohriegl, Peter ; Saller, Christina ; Knauer, Philipp ; Köhler, Anna ; Hahn, Tobias ; Fischer, Florian ; Kahle, Frank-Julian:
Crosslinkable low bandgap polymers for organic solar cells.
In: Kafafi, Zakya H. ; Lane, Paul A. ; Samuel, Ifor D. W. (ed.): Organic voltaics XVII. - Bellingham, Washington : SPIE , 2016 . - No. 99420O . - (Proceedings of SPIE ; 9942 )
DOI: https://doi.org/10.1117/12.2239400

Fishchuk, Ivan I. ; Kadashchuk, Andrey ; Hoffmann, Sebastian T. ; Athanasopoulos, Stavros ; Genoe, Jan ; Bässler, Heinz ; Köhler, Anna:
Analytic model of hopping transport in organic semiconductors including both energetic disorder and polaronic contributions.
In: Palassini, Matteo (Ed.):15th International Conference on Transport in Interacting Disordered Systems (TIDS15). - Melville, NY : AIP Publishing , 2014 . - pp. 47-52 . - (AIP Conference Proceedings ; 1610 )
ISBN 978-0-7354-1246-0
DOI: https://doi.org/10.1063/1.4893509

Strohriegl, Peter ; Wagner, Daniel ; Schrögel, Pamela ; Hoffmann, Sebastian T. ; Köhler, Anna ; Heinemeyer, Ute ; Münster, Ingo:
Novel host materials for blue phosphorescent OLEDs.
In: So, Franky (Hrsg.): Organic light emitting materials and devices XVII. - Bellingham, Washington : SPIE , 2013 . - No. 882906 . - (Proceedings of SPIE ; 8829 )
ISBN 9780819496799
DOI: https://doi.org/10.1117/12.2023305

Conference item

Biberger, Simon ; Spies, Maximilian ; Schötz, Konstantin ; Kahle, Frank-Julian ; Leupold, Nico ; Moos, Ralf ; Grüninger, Helen ; Köhler, Anna ; Panzer, Fabian:
Improved Control of Perovskite Thin Film Fabrication via Reactive Spin coating based on Real-Time In-Situ Feedback from Optical Spectroscopy.
2024
Event: 26. International Conference on Science and Technology of Synthetic Electronic Materials (ICSM 24) , 23-28 June 2024 , Dresden, Germany.
(Conference item: Conference , Speech )

Siegert, Tobias ; Haddadi Barzoki, Fatemeh ; Griesbach, Marco ; Greve, Christopher ; Moos, Ralf ; Herzig, Eva M. ; Köhler, Anna ; Grüninger, Helen:
Influence of Particle Size on the Formation of Solid Solutions Between MAPbI 3 and MAPbBr3.
2024
Event: DPG-Frühjahrstagung , 17.03.-22.03.2024 , Berlin.
(Conference item: Conference , Poster )

Biberger, Simon ; Spies, Maximilian ; Schötz, Konstantin ; Kahle, Frank-Julian ; Leupold, Nico ; Moos, Ralf ; Grüninger, Helen ; Köhler, Anna ; Panzer, Fabian:
Optical In-Situ spectroscopy and reactive spin coating for improved control of perovskite thin film fabrication.
2024
Event: DPG-Frühjahrstagung , 17.03.-22.03.2024 , Berlin.
(Conference item: Conference , Speech )

Witt, Christina ; Schötz, Konstantin ; Kuhn, Meike ; Leupold, Nico ; Biberger, Simon ; Ramming, Philipp ; Köhler, Anna ; Moos, Ralf ; Herzig, Eva M. ; Panzer, Fabian:
Understanding Structural Differences in Completely Dry-Processed MAPbI3 Thin Films by Detailed Analyses of Temperature-Dependent Optical Spectroscopy.
2023
Event: 2023 MRS Spring Meeting & Exhibit , April 10-14, 2023 , San Francisco, California, USA.
(Conference item: Conference , Poster )

Witt, Christina ; Schötz, Konstantin ; Biberger, Simon ; Leupold, Nico ; Kuhn, Meike ; Ramming, Philipp ; Herzig, Eva M. ; Moos, Ralf ; Panzer, Fabian ; Köhler, Anna:
Fully Dry-Processed and Powder-Based Halide Perovskite Solar Cells by Powder-Aerosol-Deposition and Hot-Pressing.
2023
Event: 2023 MRS Spring Meeting & Exhibit , April 10-14, 2023 , San Francisco, California, USA.
(Conference item: Conference , Poster )

Biberger, Simon ; Spies, Maximilian ; Schötz, Konstantin ; Kahle, Frank-Julian ; Leupold, Nico ; Moos, Ralf ; Grüninger, Helen ; Köhler, Anna ; Panzer, Fabian:
Improved Control of Perovskite Thin Film Formation by Reactive Spin Coating and Real Time In-Situ Feedback.
2023
Event: 12th SolTech Conference 2023 , 03.-05.10.2023 , Würzburg, Germany.
(Conference item: Conference , Speech )

Siegert, Tobias ; Greve, Christopher ; Moos, Ralf ; Herzig, Eva M. ; Panzer, Fabian ; Köhler, Anna ; Grüninger, Helen:
Influence of Particle Size on Halide Mixing Between MAPbI3 and MAPbBr3.
2023
Event: 12th SolTech Conference 2023 , 03.-05.10.2023 , Würzburg, Germany.
(Conference item: Conference , Poster )

Ramming, Philipp ; Siegert, Tobias ; Biberger, Simon ; Witt, Christina ; Leupold, Nico ; Moos, Ralf ; Grüninger, Helen ; Panzer, Fabian ; Köhler, Anna:
Perovskite Research Highlights.
2023
Event: 12th SolTech Conference 2023 , 03.-05.10.2023 , Würzburg, Germany.
(Conference item: Conference , Speech )

Biberger, Simon ; Schötz, Konstantin ; Leupold, Nico ; Ramming, Philipp ; Spies, Maximilian ; Moos, Ralf ; Köhler, Anna ; Grüninger, Helen ; Panzer, Fabian:
Using Multimodal In Situ Spectroscopy to Understand the Influence of the Ionic Liquid BMIMBF4 on the Film Formation and Optoelectronic Properties of MAPbI3 Thin Films.
2023
Event: 2023 MRS Spring Meeting & Exhibit , April 10-14, 2023 , San Francisco, California, USA.
(Conference item: Conference , Speech )

Leupold, Nico ; Schötz, Konstantin ; Daubinger, Monika ; Dürrmann, Andreas ; Bauer, Irene ; Köhler, Anna ; Moos, Ralf ; Panzer, Fabian:
Large batch mechanochemically synthesized powders of hybrid perovskites for optoelectronic applications.
2018
Event: 4th International Conference on Perovskite Solar Cells and Optoelectronics , 30.09. - 02.10.2018 , Lausanne, Switzerland.
(Conference item: Conference , Poster )

Patent

Köhler, Anna ; Leupold, Nico ; Moos, Ralf ; Panzer, Fabian ; Schötz, Konstantin:
Verfahren zur Aufarbeitung von hybriden Perowskiten.
DE 102019001366 (2019)

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