title: Direct Imaging of Highly Anisotropic Photogenerated Charge Separations on Different Facets of a Single BiVO4 Photocatalyst.
abstract: Spatially resolved surface photovoltage spectroscopy (SRSPS) was employed to obtain direct evidence for highly anisotropic photogenerated charge separation on different facets of a single BiVO4 photocatalyst. Through the controlled synthesis of a single crystal with preferentially exposed {010} facets, highly anisotropic photogenerated hole transfer to the {011} facet of single BiVO4 crystals was observed. The surface photovoltage signal intensity on the {011} facet was 70 times stronger than that on the {010} facets. The influence of the built-in electric field in the space charge region of different facets on the anisotropic photoinduced charge transfer in a single semiconductor crystal is revealed.
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Zhongshan Road 457, Dalian 116023 (China).|Graduate University of Chinese Academy of Sciences, Beijing 100049 (China Department).
authors.forename: Jian
authors.initials: J
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Zhongshan Road 457, Dalian 116023 (China).
authors.forename: Fengtao
authors.initials: F
authors.lastname: Fan
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Zhongshan Road 457, Dalian 116023 (China).|Graduate University of Chinese Academy of Sciences, Beijing 100049 (China Department).
authors.forename: Ruotian
authors.initials: R
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Zhongshan Road 457, Dalian 116023 (China).|Graduate University of Chinese Academy of Sciences, Beijing 100049 (China Department).
authors.forename: Hongyu
authors.initials: H
authors.lastname: An
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Zhongshan Road 457, Dalian 116023 (China).
authors.forename: Zhaochi
authors.initials: Z
authors.lastname: Feng
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Zhongshan Road 457, Dalian 116023 (China). canli@dicp.ac.cn.
authors.forename: Can
authors.initials: C
authors.lastname: Li
keywords: charge carrier injection; charge separation; crystal engineering; imaging; photocatalysis