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Improved All‐Polymer Solar Cell Performance by Using Matched Polymer Acceptor
Author(s) -
Shi Shaohua,
Yuan Jianyu,
Ding Guanqun,
Ford Michael,
Lu Kunyuan,
Shi Guozheng,
Sun Jianxia,
Ling Xufeng,
Li Yong,
Ma Wanli
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201601037
Subject(s) - materials science , acceptor , polymer , polymer solar cell , crystallinity , coplanarity , energy conversion efficiency , intermolecular force , organic solar cell , photovoltaic system , chemical engineering , chemical physics , polymer chemistry , optoelectronics , molecule , composite material , organic chemistry , chemistry , ecology , physics , geometry , mathematics , engineering , biology , condensed matter physics
By the introduction of different building blocks and side‐chains, a series of donor–acceptor type polymer acceptors containing naphthalene diimide have been successfully prepared. The theoretical and experimental results show that the molecular design effectively tunes the energy levels, solubility, and coplanarity of the acceptor polymers. The intermolecular packing, which has been considered as a key factor in the bulk heterojunction morphology, has been adjusted by changing the coplanarity. As a result of improved morphology and fine‐tuned energy levels, a power conversion efficiency of 6.0% has been demonstrated for the optimized devices, which is among the highest‐efficiencies for reported all‐polymer solar cells. The improved device performance may be attributed to the resemble crystallinity of the donor/acceptor polymers, which can lead to the optimal phase separation morphology balancing both charge transfer and transport.