标题:Efficient Ternary Organic Solar Cells Enabled by the Integration of Nonfullerene and Fullerene Acceptors with a Broad Composition Tolerance
作者:Fu H.; Li C.; Bi P.; Hao X.; Liu F.; Li Y.; Wang Z.; Sun Y.
作者机构:[Fu, H] Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Bei 更多
通讯作者:Wang, Z(wangzhaohui@iccas.ac.cn)
通讯作者地址:[Wang, Z] Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of SciencesChi 更多
来源:Advanced Functional Materials
出版年:2018
DOI:10.1002/adfm.201807006
关键词:fullerene acceptors; nonfullerene acceptors; power conversion efficiencies; stability; ternary organic solar cells
摘要:The ternary structure that combines fullerene and nonfullerene acceptors in a photoactive layer is demonstrated as an effective approach for boosting the power conversion efficiencies (PCEs) of organic solar cells (OSCs). Here, highly efficient ternary OSCs comprising a wide-bandgap polymer donor (PBT1-C), a narrow-bandgap nonfullerene acceptor (IT-2F), and a typical fullerene derivative (PC71BM) are reported. It is found that the addition of PC71BM into the PBT1-C:IT-2F blend not only increases the device efficiency up to 12.2%, but also improves the ambient stability of the OSCs. Detailed investigations indicate that the improvement in photovoltaic performance benefits from synergistic effects of increased photon-harvesting, enhanced charge separation and transport, suppressed trap-assisted recombination, and optimized film morphology. Moreover, it is noticed that such a ternary system exhibits excellent tolerance to the PC71BM component, for which PCEs over 11.2% can be maintained throughout the whole blend ratios, higher than that (11.0%) of PBT1-C:IT-2F binary reference device. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
收录类别:SCOPUS
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058014497&doi=10.1002%2fadfm.201807006&partnerID=40&md5=33b9e264f4a9bcdb52b82b724ba71e33
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