Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 31, Pages 9111-9114Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201504135
Keywords
charge carrier injection; charge separation; crystal engineering; imaging; photocatalysis
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Funding
- 973 National Basic Research Programme of the Ministry of Science and Technology [2014CB239403]
- Key Research Program of the Chinese Academy of Sciences
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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.
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