title: New triphenylamine organic dyes containing dithieno[3,2-b:2',3'-d]pyrrole (DTP) units for iodine-free dye-sensitized solar cells.
abstract: Three dithieno[3,2-b:2',3'-d]pyrrole (DTP) units with different hexyloxyphenyl (HOP) substituents have been developed for triphenylamine organic dyes (XS54-XS56). The introduction of the 4-HOP-DTP unit has resulted in a stronger light harvesting capacity, accounting for the observed photocurrent enhancement in the case of XS54, while the 2-HOP-DTP/2,4-HOP-DTP units induce a strikingly large photovoltage improvement in the cases of XS55 and XS56 due to their higher steric hindrance.
authors.affiliation: Department of Chemistry, Tianjin University, Tianjin, 300072, P.R. China.
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Wang
authors.forename: Mao
authors.initials: M
authors.lastname: Liang
authors.forename: Lina
authors.initials: L
authors.lastname: Wang
authors.forename: Yujie
authors.initials: Y
authors.lastname: Hao
authors.forename: Chunbo
authors.initials: C
authors.lastname: Wang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Sun
authors.forename: Song
authors.initials: S
authors.lastname: Xue