Photoelectrochemical cells with tungsten trioxide/Mo-doped BiVO 4 bilayers

Kan Zhang, Xin Jian Shi, Jung Kyu Kim, Jong Hyeok Park

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Abstract

Mo-doped BiVO 4 nanocrystals with low bandgap energy were embedded into the surface of WO 3 film, resulting in WO 3/BiV 0.95Mo 0.05O 4 photoanodes, which were tested in photoelectrochemical cells for water splitting. Bilayer photoelectrochemical cells showed enhanced photocurrent density: three times that shown by a cell with a pure WO 3 photoanode and 1.5 times that of a cell with a WO 3/BiVO 4 bilayer photoanode. BiVO 4 showed poor charge carrier mobility; the performance of photoelectrochemical cells can be improved only when BiVO 4 is combined with a WO 3 bottom layer, even after Mo doping and tailoring its transition energies by atomic doping.

Original languageEnglish
Pages (from-to)11119-11124
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume14
Issue number31
DOIs
Publication statusPublished - 2012 Aug 21

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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