Improved charge separation efficiency of hematite photoanodes by coating an ultrathin p-type LaFeO3 overlayer

Tao Fang, Yongsheng Guo, Songhua Cai, Ningsi Zhang, Yingfei Hu, Shiying Zhang, Zhaosheng Li, Zhigang Zou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Many metal-oxide candidates for photoelectrochemical water splitting exhibit localized small polaron carrier conduction. Especially hematite (α-Fe2O3) photoanodes often suffer from low carrier mobility, which causes the serious bulk electron-hole recombination and greatly limits their PEC performances. In this study, the charge separation efficiency of hematite was enhanced greatly by coating an ultrathin p-type LaFeO3 overlayer. Compared to the hematite photoanodes, the solar water splitting photocurrent of the Fe2O3/LaFeO3 n-p junction exhibits a 90% increase at 1.23 V versus the reversible hydrogen electrode, due to enlarging the band bending and expanding the depletion layer.

Original languageEnglish
Article number394003
JournalNanotechnology
Volume28
Issue number39
DOIs
Publication statusPublished - 7 Sep 2017
Externally publishedYes

Keywords

  • charge separation efficiency
  • hematite
  • LaFeO
  • photoanode
  • water splitting

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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