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Direct Imaging of Highly Anisotropic Photogenerated Charge Separations on Different Facets of a Single BiVO4 Photocatalyst |
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| Authors: | Jian Zhu Fengtao Fan Ruotian Chen Hongyu An Prof. Zhaochi Feng Prof. Can Li |
| Affiliation: | 1. 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);2. Graduate University of Chinese Academy of Sciences, Beijing 100049 (China Department) |
| 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. |
| Keywords: | charge carrier injection charge separation crystal engineering imaging photocatalysis |