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Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers
Author(s) -
Huang Jiang,
Wang Hanyu,
Yan Kangrong,
Zhang Xiaohua,
Chen Hongzheng,
Li ChangZhi,
Yu Junsheng
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201606729
Subject(s) - materials science , organic solar cell , photocurrent , active layer , polymer solar cell , optoelectronics , energy conversion efficiency , band gap , layer (electronics) , nanotechnology , composite material , polymer , thin film transistor
An organic solar cell (OSCs) containing double bulk heterojunction (BHJ) layers, namely, double‐BHJ OSCs is constructed via stamp transferring of low bandgap BHJ atop of mediate bandgap active layers. Such devices allow a large gain in photocurrent to be obtained due to enhanced photoharvest, without suffering much from the fill factor drop usually seen in thick‐layer‐based devices. Overall, double‐BHJ OSC with optimal ≈50 nm near‐infrared PDPP3T:PC 71 BM layer atop of ≈200 nm PTB7‐Th:PC 71 BM BHJ results in high power conversion efficiencies over 12%.