Design Principles of Diketopyrrolopyrrole-Thienopyrrolodione Acceptor₁–Acceptor₂ Copolymers

Title data

Erhardt, Andreas ; Hungenberg, Julian ; Chantler, Paul ; Kuhn, Meike ; Huynh, Thanh Tung ; Hochgesang, Adrian ; Goel, Mahima ; Müller, Christian J. ; Roychoudhury, Subhayan ; Thomsen, Lars ; Medhekar, Nikhil V. ; Herzig, Eva M. ; Prendergast, David ; Thelakkat, Mukundan ; McNeill, Christopher R.:
Design Principles of Diketopyrrolopyrrole-Thienopyrrolodione Acceptor₁–Acceptor₂ Copolymers.
In: Advanced Functional Materials. (2024) . - 2314696.
ISSN 1616-3028
DOI: https://doi.org/10.1002/adfm.202314696

Official URL:

Abstract in another language

The design principles of acceptor1–acceptor2 copolymers featuring alternating diketopyrrolopyrrole (DPP) and thienopyrrolodione (TPD) moieties are investigated. The investigated series of polymers is obtained by varying the aromatic linker between the two acceptor motifs between thiophene, thiazole, pyridine, and benzene. High electron affinities between 3.96 and 4.42 eV, facilitated by the synergy of the acceptor motifs are determined with optical gaps between 1.37 and 2.02 eV. Grazing incidence wide-angle X-ray scattering studies reveal a range of film morphologies after thermal annealing, including face-on, end-on and superstructure edge-on-like crystallites. Conversely, all materials form thin edge-on layers on the polymer–air interface, as demonstrated by multi-elemental near-edge X-ray absorption fine-structure spectroscopy. The benefit of the electron-deficient linkers thiazole and pyridine is evident: In organic field effect transistors, electron mobilities of up to 4.6 × 10−2 cm2 V−1 s−1 are obtained with outstanding on/off current ratios of 5 × 105, facilitated by the absence of detectable hole transport in these materials. Viability for all-polymer solar cells is assessed in active layer blends with the donor polymer PM6, yielding a maximum average power conversion efficiency of 4.8% and an open circuit voltage above 1 V.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	acceptor1–acceptor2 copolymers; all-polymer solar cells; microstructure; OFET; organic semiconductors
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Experimental Physics VII - Dynamics and Structure Formation Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Experimental Physics VII - Dynamics and Structure Formation > Professor Experimental Physics VII - Dynamics and Structure Formation - Univ.-Prof. Dr. Eva M. Herzig
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 530 Physics
Date Deposited:	13 May 2024 08:57
Last Modified:	13 May 2024 11:46
URI:	https://eref.uni-bayreuth.de/id/eprint/89531