A nano-modified Si/TiO2 composite electrode for efficient solar water splitting

Susumu Takabayashi, Ryuhei Nakamura, Yoshihiro Nakato

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)

Abstract

Solar water splitting with a composite polycrystalline-Si/doped TiO2 thin-film electrode is proposed as a promising new approach to high-efficiency and low-cost solar-to-chemical conversion. The advantage, efficiency, stability, and some problems to be solved are reviewed mainly on the basis of reported results. It is shown that (1) an n-Si electrode with surface alkylation and metal nano-dot coating gives an efficient and stable photovoltaic characteristic, (2) TiO2 (and similar metal oxides) doped with other elements, such as nitrogen and sulfur, can cause water photooxidation (oxygen photoevolution) by visible-light illumination, and thus (3) a coupling of these two electrodes is effective for efficient water splitting under solar illumination.

Original languageEnglish
Pages (from-to)107-113
Number of pages7
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume166
Issue number1-3
DOIs
Publication statusPublished - 2004 Aug 12

Keywords

  • Hydrogen
  • Nano-particles
  • Photocatalysis
  • Photoelectrochemistry
  • Surface modification
  • Thin film

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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