Heteroatom substitution-induced asymmetric A-D-A type non-fullerene acceptor for efficient organic solar cells

• 来源期刊: 能源化学
• 年，卷（期）: 2020,（1）
• 页码范围: 144-150
• 页数: 7页
• 语种: 英文

摘要

Research on asymmetric A-D-A structured non-fullerene acceptors has lagged far behind the development of symmetric counterpart.In this contribution,by simply replacing one sulfur atom in indacenodithiophene unit with a selenium atom,an asymmetric building block SePT and a corresponding asymmetric non-fullerene acceptor SePT-IN have been developed.Asymmetric SePT-IN achieved a high efficiency of 10.20％ in organic solar cells when blended with PBT1-C,much higher than that of symmetric TPT-IN counterpart (8.91％).Our results demonstrated an effective heteroatom substitution strategy to develop asymmetric A-D-A structured non-fullerene acceptors.