Residual Energy Harvesting from Light Transients Using Hematite as an Intrinsic Photocapacitor in a Symmetrical Cell

Nicole van Leeuwen, Burgert Blom, Mengying Xie, Vana Adamaki, Chris R. Bowen, Moises A. de Araujo, Lucia H. Mascaro, Petra J. Cameron, Frank Marken

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Hematite as a sustainable photoabsorber material offers a band gap close to 2 eV and photoanode characteristics, but usually requires additional catalysts to enhance surface redox chemistry during steady state light energy harvesting for water splitting. Here, for a highly doped hematite film, sufficient intrinsic photocapacitor behavior is reported for the conversion of light transients into energy. Residual energy is harvested in a symmetric architecture with two opposing mesoporous hematite films on conductive glass. Transient light energy harvesting is shown to occur without the need for water splitting.
Original languageEnglish
Pages (from-to)38-42
Number of pages5
JournalACS Applied Energy Materials
Volume1
Issue number1
DOIs
Publication statusPublished - Jan 2018

Keywords

  • ALPHA-FE2O3 PHOTOANODES
  • CONVERSION
  • DYNAMICS
  • ELECTRICAL-PROPERTIES
  • FILMS
  • KINETICS
  • OXYGEN EVOLUTION
  • STORAGE
  • WATER
  • charge carrier
  • energy conversion
  • energy harvesting cycle
  • flicker light
  • photocapacitance
  • time constant

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