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Organic solar cells based on non-fullerene acceptors of nine fused-ring by modifying end groups
Organic Electronics ( IF 3.2 ) Pub Date : 2020-02-26 , DOI: 10.1016/j.orgel.2020.105662
Jingbo Xiao , Tingting Yan , Tao Lei , Yanbo Li , Yufang Han , Liang cao , Wei Song , Songting Tan , Ziyi Ge

A series of small molecule acceptors (SMAs) based on a benzodithiophene-pyrrolobenzothiadiazole-based nine fused-ring core and different end groups of 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene) malononitrile (2FIC), 3-(dicyanomethylene)indian-1-one (IC) and 2-(3-ethyl-4-oxo-thiazolidin-2-ylidene) malononitrile (RCN) have been designed and synthesized. The SMAs X94FIC, X9IC, X9Rd and X9T4FIC were chosen as electron acceptors with blending the donor polymer PBDB-T to prepare the organic solar cells (OSCs) and investigate photoelectric performance. Surprisingly, X94FIC showed an excellent photo-response up to 1000 nm, while X9IC and X9T4FIC also possess a photo-response to 900 nm. A power conversion efficiency (PCE) of 7.08% was obtained for the active layers PBDB-T:X94FIC. This result demonstrates that small molecule acceptor containing the nine fused-ring core and the end group with di-fluorine atoms is promising candidate for the development of high performance non-fullerene OSCs.



中文翻译:

通过修饰端基,基于九个稠环非富勒烯受体的有机太阳能电池

基于基于苯并二噻吩-吡咯并苯并噻二唑的九个稠环核心和2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-的不同端基的一系列小分子受体(SMA)设计并合成了1-亚丙基)丙二腈(2FIC),3-(二氰基亚甲基)茚-1-酮(IC)和2-(3-乙基-4-氧代噻唑烷-2-亚丙基)丙二腈(RCN)。选择SMAs X94FIC,X9IC,X9Rd和X9T4FIC作为电子受体,将供体聚合物PBDB-T掺混以制备有机太阳能电池(OSC)并研究光电性能。出乎意料的是,X94FIC在高达1000 nm的波长下表现出出色的光响应,而X9IC和X9T4FIC在900 nm的波长上也具有光响应。有源层PBDB-T:X94FIC的功率转换效率(PCE)为7.08%。

更新日期:2020-02-26
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