Photoelectrochemical CO2 conversion to hydrocarbons using an AlGaN/GaN-Si tandem photoelectrode

Masahiro Deguchi*, Satoshi Yotsuhashi, Yuka Yamada, Kazuhiro Ohkawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We report on a qualitatively improved photoelectrochemical COreduction system which makes it possible to convert CO2 into hydrocarbons. The key is the tandem photoelectrode, which consists of AlGaN/GaN and Si device with p-n junction. The Si device is located on the back of AlGaN/GaN structure and acts as activation layer that raises cathode potential. Use of a Cu cathode results in change of the main reaction products from CO and HCOOH to hydrocarbons such as CHand C The energy conversion efficiency to hydrocarbons from COis estimated to be 0.046% under irradiation with concentrated solar light.

Original languageEnglish (US)
Article number537860
JournalAdvances in Condensed Matter Physics
StatePublished - 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Masahiro Deguchi et al.

ASJC Scopus subject areas

  • Condensed Matter Physics


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