New BODIPY derivatives with triarylamine and truxene substituents as donors for organic bulk heterojunction photovoltaic cells. (October 2021)

• Record Type: Journal Article
• Authors: Cai, Fangjian; Guo, Yingxin; Fang, Yuanyuan; Gros, Claude P.; Agrawal, Anupam; Sharma, Ganesh D.; Xu, Haijun
• Is Part Of: Solar energy. Volume 227(2021)
• Page Start: 354
• Page End: 364
• Publication Date: 2021-10
• Subjects: Organic photovoltaic cells -- BODIPY derivatives -- Non-fullerene acceptor -- Small-molecule donors -- Bulk heterojunction; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2021.09.017
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: Two new BODIPY derivatives, 6a and 6b, with truxene moiety and triphenylamine were prepared. The optical and electrochemical properties were investigated. The photovoltaic properties of organic solar cells OSCs were investigated. The ternary OSCs based on the 6a :PC71 BM :Y6 and 6b :PC71 BM :Y6 showed high Power Conversion Efficiency of 11.37 % and 13.32 %, respectively. The reason of the higher power conversion efficiency for ternary OSC was clarified. Abstract: We have designed two new BODIPY derivatives, denoted as 6a and 6b, substituted with truxene moiety and triphenylamine (TPA) unit groups and have investigated their optical and electrochemical properties. Dyes 6a and 6b were employed as donor along with PC71 BM or Y6 as acceptor for the fabrication of binary and ternary organic solar cells. After optimization of the binary and ternary active layers, we have achieved over all power conversion efficiency (PCE) of 11.37 % and 13.32% for 6a :PC71 BM :Y6 and 6b :PC71 BM :Y6 ternary organic solar cells, respectively, which are higher than the binary organic solar cells based on PC71 BM or Y6 acceptor. The higher power conversion efficiency for ternary OSC is possibly attributed to the better exciton generation rate, exciton dissociation and charge collection.