Rational design of π-bridges for ambipolar DPP-RH-based small molecules in organic photovoltaic cells

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• 作者：Yoonho Eom^a ; Chang Eun Song^b ; Won Suk Shin^b ; Sang Kyu Lee^b ; Eunhee Lim^a ; ^{ehlim@kyonggi.ac.kr}
• 关键词：Organic photovoltaic cell (OPV) ; Organic solar cell ; Diketopyrrolopyrrole (DPP) ; Thiophene ; Acceptor
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2017
• 出版时间：25 January 2017
• 年：2017
• 卷：45
• 期：Complete
• 页码：338-348
• 全文大小：3968 K
• 卷排序：45

文摘

A series of small molecules based on diketopyrrolopyrrole (DPP) and rhodanine (RH) dye for OPVs. They have different π-bridges of bithiophene (2T), furan-thiophene (FT), and thiophene (T). Introduction of furan resulted in relatively high crystallinity of DPPFT-RH. Frontier energy levels decreased in the order DPP2T-RH > DPPFT-RH > DPPT-RH. Ambipolar small molecules showed PCE of ∼1% when used as both donors and acceptors.