CoAl2O4-Fe2O3 p-n Nanocomposite Electrodes for Photoelectrochemical Cells

Kwang Soon Ahn, Yanfa Yan, Moon Sung Kang, Jin Young Kim, Sudhakar Shet, Heli Wang, John Turner, Mowafak Al-Jassim

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CoAl2O4 - Fe2 O3 p-n nanocomposite electrodes were deposited on Ag-coated stainless-steel substrates and annealed at 800 °C. Their photoelectrochemical (PEC) properties were investigated and compared with that of p -type CoAl2 O4 films. We found that the nanocomposite electrodes exhibit much improved PEC photoresponse as compared to the reference p -type CoAl2 O 4 electrodes. We speculate that the enhancement is due to the formation of a three-dimensional junction between p -type CoAl2 O4 and n -type Fe2 O3 nanoparticles, which improves electron-hole separation, thus reducing charge recombination upon light illumination.

Original languageAmerican English
Article numberArticle No. 022116
Number of pages3
JournalApplied Physics Letters
Issue number2
StatePublished - 2009

NREL Publication Number

  • NREL/JA-520-45838


  • coal
  • electrodes
  • nanocomposites
  • nanoparticles
  • ozone


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