Double-deck inverse opal photoanodes: Efficient light absorption and charge separation in heterojunction

Ming Ma, Jung Kyu Kim, Kan Zhang, Xinjian Shi, Sung June Kim, Jun Hyuk Moon, Jong Hyeok Park

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

For the first time, double-deck WO3/BiVO4 inverse opal photoanodes (DDIO-WO3/BiVO4) were prepared by swelling-shrinking mediated polystyrene template synthetic routes, and the use of the photoanodes in photoelectrochemical cells under simulated solar light was investigated. The double-deck photoanodes represented the compact interface between WO3 and BiVO4, inheriting the periodically ordered macroporous nanostructure. More significantly, the DDIO-WO3/BiVO4 inverse opal photoanodes prepared from the optimized fabrication condition demonstrated a photocurrent that was ∼40 times higher than that of the pure inverse opal WO3 photoanodes at a bias of 1.23 V vs RHE. Even without an added catalyst, they produce an outstanding photocurrent density of ∼3.3 mA/cm2 at a bias of 1.23 V vs RHE, which profits from improving the poor charge carrier mobility of BiVO4 by combining it with a WO3 skeleton and a shrouded bilayer inverse opal structure with a large surface area and good contact with the electrolyte. (Chemical Equation Presented).

Original languageEnglish
Pages (from-to)5592-5597
Number of pages6
JournalChemistry of Materials
Volume26
Issue number19
DOIs
Publication statusPublished - 2014 Oct 14

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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