title: D-A-D structured organic molecules with diketopyrrolopyrrole acceptor unit for solution-processed organic solar cells.
abstract: Four solution-processable D-A-D structured organic molecules with diketopyrrolopyrrole (DPP) as acceptor unit and triphenylamine (TPA) or (4-hexyl)thieno [3,2-b]thiophene (HTT) as donor unit, DPP8-TPA, DPP8-TPA-OR, DPP6-HTT and DPP8-HTT, were designed and synthesized for the application as donor materials in solution-processed organic solar cells (OSCs). The molecules show broad absorption and relatively lower highest occupied molecular orbital energy levels. Photovoltaic properties of the molecules were investigated by fabricating the bulk-heterojunction OSCs with the molecules as donor and PC71BM as acceptor. Power conversion efficiency of the OSC based on DPP8-HTT reached 1.5% under the illumination of AM1.5, 100 mW cm(-2).
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, , Beijing 100190, People's Republic of China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Chang
authors.initials: C
authors.lastname: He
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Zhang
authors.forename: Dan
authors.initials: D
authors.lastname: Deng
authors.forename: Maojie
authors.initials: M
authors.lastname: Zhang
authors.forename: Yongfang
authors.initials: Y
authors.lastname: Li
keywords: diketopyrrolopyrrole-containing molecules; organic solar cells; solution-processable organic molecules