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Citation: Ren Yan-Zhi, Yu Jian-Feng, Wu Tong-Hao, Wang De-Jun, Cui Yi. The Effect of Modulated Surface Band Bending on Photovoltage Spectra[J]. Acta Physico-Chimica Sinica, ;1995, 11(03): 274-278. doi: 10.3866/PKU.WHXB19950318 shu

The Effect of Modulated Surface Band Bending on Photovoltage Spectra

1.
Department of Chemistry,Jilin University,Changchun 130023

Received Date: 21 January 1994
Available Online: 15 March 1995

The surface photovoltage spectra (SPS) of a series of samples BixPMo12Oy(x=2 ~ 9, y=43 ~ 64) were measured. It was found that with the increase of Bi/P molar ratio, SPS exhibits regular evolutions characteristic of modulated surface band bendings. Another experiment using the samples as catalysts in selective oxidation of propane showed that the Bi/P molar ratio influences the basic capacity of vacancies in the scheelite-type structure; and thus it influences the surface band bending. A simple model was presented to account for the effect of band bending on photovoltages due to bandgap and sub-bandgap illumination.
- Surface photovoltage spectra,
- Surface band bending,
- Catalytic activity
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