High Solar Flux Concentration Water Splitting with Hematite (α-Fe2O3) Photoanodes

Gideon Segev, Hen Dotan, Kirtiman Deo Malviya, Asaf Kay, Matthew T. Mayer, Michael Grätzel, Avner Rothschild*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The water splitting performance of hematite photoanodes is explored under a wide range of light intensities. The photocurrent scales linearly and the photovoltage scales logarithmically with the intensity, showing steeper rate than in photovoltaics, probably due to the enhanced ratio between charge transfer and recombination at high intensities. Hence, light concentration serves as another handle to enhance the efficiency of hematite photoanodes.

Original languageEnglish
Article number1500817
JournalAdvanced Energy Materials
Issue number1
StatePublished - 7 Jan 2016
Externally publishedYes


  • concentrated solar power
  • hematite
  • photocurrent
  • photoelectrochemical cells
  • photovoltage
  • water splitting


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