title: Colloidal CuInS2 Quantum Dots as Inorganic Hole-Transporting Material in Perovskite Solar Cells.
abstract: To develop novel hole-transporting materials (HTMs) is an important issue of perovskite solar cells (PSCs), especially favoring the stability improvement and the cost reduction. Herein, we use ternary quantum dots (QDs) as HTM in mesoporous TiO2/CH3NH3PbI3/HTM/Au solar cell, and modify the surface of CuInS2 QDs by cation exchange to improve the carrier transport. The device efficiency using CuInS2 QDs with a ZnS shell layer as HTM is 8.38% under AM 1.5, 100 mW cm(-2). The electrochemical impedance spectroscopy suggested that the significantly enhanced performance is mainly attributed to the reduced charge recombination between TiO2 and HTM. It paves a new pathway for the future development of cheap inorganic HTMs for the high efficiency PSCs.
authors.affiliation: †Key Laboratory of Novel Thin Film Solar Cells, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China.
authors.forename: Mei
authors.initials: M
authors.lastname: Lv
authors.affiliation: †Key Laboratory of Novel Thin Film Solar Cells, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhu
authors.affiliation: †Key Laboratory of Novel Thin Film Solar Cells, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Huang
authors.affiliation: †Key Laboratory of Novel Thin Film Solar Cells, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.affiliation: †Key Laboratory of Novel Thin Film Solar Cells, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China.
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Shao
authors.affiliation: †Key Laboratory of Novel Thin Film Solar Cells, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China.
authors.forename: Yafeng
authors.initials: Y
authors.lastname: Xu
authors.affiliation: †Key Laboratory of Novel Thin Film Solar Cells, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China.|‡Beijing Key Laboratory of Novel Thin Film Solar Cells, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, P. R. China.
authors.forename: Songyuan
authors.initials: S
authors.lastname: Dai
keywords: CuInS2; hole-transporting materials; interface recombination; perovskite solar cells; quantum dots