Kinetic control of electron transfer at doped zinc oxide/redox-active molecule interface for photocurrent rectification

Michio Suzuka, Shu Hara, Takashi Sekiguchi, Kenichi Oyaizu, Hiroyuki Nishide

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2 Citations (Scopus)


Reactivity of redox-active molecules for heterogeneous electron-transfer processes at the surface of doped zinc oxide substrates depended on their energy levels. The redox-active molecules with negative redox potentials displayed a reversible electrochemical response but those with positive redox potentials were characterized by slow electrode kinetics, which was attributed to more than three times larger heterogeneous electron-transfer rate constant for the former redox-active molecules. A photovoltaic cell using methyl viologen as an acceptor molecule, TEMPOL as a donor molecule, and the doped ZnO as the transparent conducting substrate gave high photovoltage, which was ascribed to the reactivity of the redox-active molecules at the doped ZnO surface.

Original languageEnglish
Pages (from-to)41-43
Number of pages3
JournalChemistry Letters
Issue number1
Publication statusPublished - 2015


ASJC Scopus subject areas

  • Chemistry(all)

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