title: A hydrophobic hole transporting oligothiophene for planar perovskite solar cells with improved stability.
abstract: An oligothiophene derivative named DR3TBDTT with high hydrophobicity was synthesized and functioned as the hole transporting material without an ion additive. 8.8% of power conversion efficiency was obtained for CH3NH3PbI3-xClx based planar solar cells with improved stability, compared to devices using Li-TFSI doped spiro-MeOTAD.
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China. lxxiao@pku.edu.cn.
authors.forename: Lingling
authors.initials: L
authors.lastname: Zheng
authors.forename: Yao-Hsien
authors.initials: YH
authors.lastname: Chung
authors.forename: Yingzhuang
authors.initials: Y
authors.lastname: Ma
authors.forename: Lipei
authors.initials: L
authors.lastname: Zhang
authors.forename: Lixin
authors.initials: L
authors.lastname: Xiao
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Chen
authors.forename: Shufeng
authors.initials: S
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Qu
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong