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Efficient Polymer Solar Cells With High Fill Factor Enabled by A Furo[3,4‐c]pyrrole‐4,6‐dione‐Based Copolymer
Author(s) -
Gao Yueyue,
Wang Zhen,
Yue Gentian,
Yu Xin,
Liu Xiansheng,
Yang Guang,
Tan Furui,
Wei Zhixiang,
Zhang Weifeng
Publication year - 2019
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.201900012
Subject(s) - materials science , polymer solar cell , copolymer , polymer , fullerene , intramolecular force , energy conversion efficiency , conjugated system , intermolecular force , acceptor , nanotechnology , polymer chemistry , chemical engineering , optoelectronics , molecule , organic chemistry , chemistry , composite material , physics , engineering , condensed matter physics
Non‐fullerene polymer solar cells (NF‐PSCs) have achieved tremendous progress in power conversion efficiency (PCE), which is mainly attributed to the well absorption complementation and the admirable energy‐level alignment between donor polymers and fullerene‐free acceptors. However, the development of efficient donor polymers pairing with fullerene‐free acceptors relatively lags behind that of fullerene‐free acceptors in terms of number and diversity for fabricating NF‐PSCs. In this work, a two‐dimensional medium bandgap copolymer (PBDFFPD) based on benzo[1,2‐b:3,4‐b′]difuran (BDF) and furo[3,4‐c]pyrrole‐4,6‐dione (FPD), is firstly designed and synthesized. The as‐prepared polymer possesses a large conjugated plane with negligible torsion, strong intermolecular and intramolecular interaction, and deep highest occupied molecular orbital (HOMO) energy level. The optimized photovoltaic device based on PBDFFPD:ITIC wins a remarkable PCE of 9.58% with a large FF of 70.1%, the highest values ever reported for FPD‐based polymers. In addition, the statistical data from different batches of devices shows that PSCs based on PBDFFPD:ITIC at optimized conditions depict an excellent reproducibility of PCE with a deviation of 2.29%. The results demonstrate that PBDFFPD possesses great potential for constructing highly efficient NF‐PSCs.