A New Nonfullerene Electron Acceptor with a Ladder Type Backbone for High-Performance Organic Solar Cells.

Qiu, Nailiang; Zhang, Huijing; Wan, Xiangjian; Li, Chenxi; Ke, Xin; Feng, Huanran; Kan, Bin; Zhang, Hongtao et al. · Adv Mater · 2017

basic_science · Level V

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Abstract

Nonfullerene acceptor FDICTF (2,9-bis(2methylene-(3-(1,1-dicyanomethylene)indanone))-7,​12-​dihydro-​4,​4,​7,​7,​12,​12-​hexaoctyl-​4H-​cyclopenta[2″,​1″:5,​6;3″,​4″:5',​6']​diindeno[1,​2-​b:1',​2'-​b']dithiophene) modified by fusing the fluorene core in a precursor, yields 10.06% high power conversion efficiency, and demonstrates that the ladder and fused core backbone in A-D-A structure molecules is an effective design strategy for high-performance nonfullerene acceptors.