@article{Wang:2023:10.1016/j.joule.2023.03.002,
author = {Wang, Y and Luke, J and Privitera, A and Rolland, N and Labanti, C and Londi, G and Lemaur, V and Toolan, DTW and Sneyd, AJ and Jeong, S and Qian, D and Olivier, Y and Sorace, L and Kim, J-S and Beljonne, D and Li, Z and Gillett, AJ},
doi = {10.1016/j.joule.2023.03.002},
journal = {Joule},
pages = {810--829},
title = {The critical role of the donor polymer in the stability of high-performance non-fullerene acceptor organic solar cells},
url = {http://dx.doi.org/10.1016/j.joule.2023.03.002},
volume = {7},
year = {2023}
}

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TY  - JOUR
AB  - The poor operational stability of non-fullerene electron acceptor (NFA) organic solar cells (OSCs) currently limits their commercial application. While previous studies have primarily focused on the degradation of the NFA component, we also consider here the electron donor material. We examine the stability of three representative donor polymers, PM6, D18, and PTQ10, paired with the benchmark NFA, Y6. After light soaking PM6 and D18 in air, we find an enhanced conversion of singlet excitons into trapped interchain polaron pairs on sub-100 femtosecond timescales. This process outcompetes electron transfer to Y6, significantly reducing the charge generation yield. However, this pathway is absent in PTQ10. We identify twisting in the benzo[1,2-b:4,5-b′]dithiophene (BDT)-thiophene motif shared by PM6 and D18 as the cause. By contrast, PTQ10 does not contain this structural motif and has improved stability. Thus, we show that the donor polymer can be a weak link for OSC stability, which must be addressed collectively with the NFA.
AU  - Wang,Y
AU  - Luke,J
AU  - Privitera,A
AU  - Rolland,N
AU  - Labanti,C
AU  - Londi,G
AU  - Lemaur,V
AU  - Toolan,DTW
AU  - Sneyd,AJ
AU  - Jeong,S
AU  - Qian,D
AU  - Olivier,Y
AU  - Sorace,L
AU  - Kim,J-S
AU  - Beljonne,D
AU  - Li,Z
AU  - Gillett,AJ
DO  - 10.1016/j.joule.2023.03.002
EP  - 829
PY  - 2023///
SN  - 2542-4351
SP  - 810
TI  - The critical role of the donor polymer in the stability of high-performance non-fullerene acceptor organic solar cells
T2  - Joule
UR  - http://dx.doi.org/10.1016/j.joule.2023.03.002
UR  - https://www.sciencedirect.com/science/article/pii/S2542435123001149
UR  - http://hdl.handle.net/10044/1/104174
VL  - 7
ER  - 

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