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- W2552809528 abstract "Kelvin Probe Force Microscopy (KPFM) and spatially resolved surface photovoltage (SRSPV) techniques were employed to reveal built-in electric fields and surface photogenerated charge distribution on single particulate photocatalysts. The photogenerated holes and electrons spread over the whole surface of the particulate photocatalyst are imaged on n-type BiVO<sub>4</sub> and p-type Cu<sub>2</sub>O single particles, respectively. It is demonstrated that the built-in electric field in the surface Space Charge Region (SCR) dictates the charge separation/transfer processes and allows the drift of one kind of the photogenerated carriers to the surface, while holding another kind of the carriers in the bulk. The results emphasize the role of the SCR played in the unidirectional charge transport between the bulk and surface in the particulate photocatalyst, which may be the crucial reason for low solar energy conversion efficiency." @default.
- W2552809528 created "2016-11-30" @default.
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- W2552809528 date "2017-01-01" @default.
- W2552809528 modified "2023-10-18" @default.
- W2552809528 title "Unravelling charge separation via surface built-in electric fields within single particulate photocatalysts" @default.
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- W2552809528 doi "https://doi.org/10.1039/c6fd00214e" @default.
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