Switchable charge-transfer in the photoelectrochemical energy-conversion process of ferroelectric BiFeO3 photoelectrodes

Dawei Cao, Zhijie Wang, Nasori, Liaoyong Wen, Yan Mi, Yong Lei*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

108 Citations (Scopus)

Abstract

Instead of conventional semiconductor photoelectrodes herein we focus on BiFeO3 ferroelectric photoelectrodes to break the limits imposed by common semiconductors. As a result of their prominent ferroelectric properties the photoelectrodes are able to tune the transfer of photo-excited charges generated either in BiFeO3 or the surface modifiers by manipulating the poling conditions of the ferroelectric domains. At 0 V vs Ag/AgCl the photocurrent could be switched from 0 μA cm-2 to 10 μA cm-2 and the open-circuit potential changes from 33 mV to 440 mV when the poling bias of pretreatment is manipulated from -8 V to +8 V. Additionally the pronounced photocurrent from charge injection of the excited surface modifiers could be quenched by switching the poling bias from +8 V to -8 V.

Original languageEnglish
Pages (from-to)11027-11031
Number of pages5
JournalAngewandte Chemie - International Edition
Volume53
Issue number41
DOIs
Publication statusPublished - 6 Oct 2014
Externally publishedYes

Keywords

  • BiFeO
  • charge transfer
  • photoelectrodes
  • polarization
  • tunability

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