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Relaxation dynamics and exciton energy transfer in the low-temperature phase of MEH-PPV

Title data

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. (2015) Issue 142 . - p. 212429.
ISSN 1089-7690
DOI: https://doi.org/10.1063/1.4918645

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Abstract in another language

Understanding the effects of aggregation on exciton relaxation and energy transfer is relevant to control photoinduced function in organic electronics and photovoltaics. Here, we explore the photoinduced dynamics in the low-temperature aggregated phase of a conjugated polymer by transient absorption and coherent electronic two-dimensional (2D) spectroscopy. Coherent 2D spectroscopy allows observing couplings among photoexcited states and discriminating band shifts from homogeneous broadening, additionally accessing the ultrafast dynamics at various excitation energies simultaneously with high spectral resolution. By combining the results of the two techniques, we differentiate between an initial exciton relaxation, which is not characterized by significant exciton mobility, and energy transport between different chromophores in the aggregate.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie - Univ.-Prof. Dr. Anna Köhler
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 23 Apr 2015 12:54
Last Modified: 08 May 2015 11:12
URI: https://eref.uni-bayreuth.de/id/eprint/10651