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Understanding the Effect of the Third Component PC 71 BM on Nanoscale Morphology and Photovoltaic Properties of Ternary Organic Solar Cells
Author(s) -
Qiu Beibei,
Chen Shanshan,
Sun Chenkai,
Yuan Jun,
Zhang Xuning,
Zhu Can,
Qin Shucheng,
Meng Lei,
Zhang Yuan,
Yang Changduk,
Zou Yingping,
Li Yongfang
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900540
Subject(s) - ternary operation , organic solar cell , materials science , acceptor , photovoltaic system , energy conversion efficiency , short circuit , optoelectronics , polymer , voltage , composite material , ecology , physics , quantum mechanics , computer science , biology , programming language , condensed matter physics
Herein, PC 71 BM is used as the third component (the second acceptor) to improve the photovoltaic performance of the organic solar cells (OSCs) based on a low‐cost polymer donor PTQ10 and a nonfullerene small‐molecule acceptor Y6. The ternary OSCs based on PTQ10:Y6:PC 71 BM reach a higher power conversion efficiency (PCE) of 16.07% with enhanced short‐circuit current density and a better fill factor in comparison with the binary OSCs based on PTQ10:Y6, which is ascribed to the higher electron mobility, better charge extraction, and suppressed charge recombination of the ternary PSCs. The film morphology of the OSCs is studied by grazing‐incidence wide‐angle X‐ray scattering, photo‐induced force microscopy, and transmission electron microscopy, which reveals that with the treatment of additive (0.5% CN) and thermal annealing, the phase separation of Y6 is obviously enhanced, whereas no significant changes occur for that of PTQ10 component. Besides, the addition of PC 71 BM slightly lowers the ratio of the face‐on orientation in the blend film and attenuate the aggregation of acceptor Y6. In addition, compared with the binary PTQ10:Y6 OSC, the ternary device based on PTQ10:Y6:PC 71 BM shows better device stability, demonstrating a great potential for the practical application of ternary OSCs.