Tunnel barrier photoelectrodes for solar water splitting

Lian Guo, David Hung, Weigang Wang, Weifeng Shen, Leyi Zhu, Chia Ling Chien, Peter C. Searson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Tunnel barrier photoelectrodes, with a thin inorganic tunnel barrier layer that isolates the semiconductor electrode from the electrolyte while allowing current flow across the interface, are a possible solution to the problem of photocorrosion in solar water splitting. In this approach, selection of the semiconductor for the light absorber is decoupled from selection of the tunnel barrier material that provides chemical stability. Here we demonstrate a proof-of-principle of this approach with TiO2/MgO tunnel barrier photoelectrodes.

Original languageEnglish (US)
Article number063111
JournalApplied Physics Letters
Issue number6
StatePublished - Aug 9 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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