首页|Enhancing BiVO4 photoanode performance by insertion of an epitaxial BiFeO3 ferroelectric layer

Enhancing BiVO4 photoanode performance by insertion of an epitaxial BiFeO3 ferroelectric layer

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
BiVO4(BVO)is a promising material as the photoanode for use in photoelectrochemical applications.However,the high charge recombination and slow charge transfer of the BVO have been obstacles to achieving satisfactory photoelectrochemical performance.To address this,various modifications have been attempted,including the use of ferroelectric materials.Ferroelectric materials can form a permanent polarization within the layer,enhancing the separation and transport of photo-excited electron-hole pairs.In this study,we propose a novel approach by depositing an epitaxial BiFeO3(BFO)thin film under-neath the BVO thin film(BVO/BFO)to harness the ferroelectric property of BFO.The self-polarization of the inserted BFO thin film simultaneously functions as a buffer layer to enhance charge transport and a hole-blocking layer to reduce charge recombination.As a result,the BVO/BFO photoanodes showed more than 3.5 times higher photocurrent density(0.65 mA cm-2)at 1.23 VRHE under the illumination compared to the bare BVO photoanodes(0.18 mA cm-2),which is consistent with the increase of the applied bias photon-to-current conversion efficiencies(ABPE)and the result of electrochemical impedance spec-troscopy(EIS)analysis.These results can be attributed to the self-polarization exhibited by the inserted BFO thin film,which promoted the charge separation and transfer efficiency of the BVO photoanodes.

PhotoelectrochemicalPhotoanodeBiVO4Ferroelectric materialsBiFeO3

Haejin Jang、Yejoon Kim、Hojoong Choi、Jiwoong Yang、Yoonsung Jung、Sungkyun Choi、Donghyeon Lee、Ho Won Jang、Sanghan Lee

展开 >

School of Materials Science and Engineering,Gwangju Institute of Science and Technology,Gwangju 61005,Republic of Korea

Department of Materials Science and Engineering,Seoul National University,Seoul 08826,Republic of Korea

program of Future Hydrogen Original Technology DevelopmentNational Research Foundation of Korea(NRF)Korean government(Ministry of Science and ICT(MSIT))NRF grant funded by the Korea government(MSIT)GIST Christian Research Crew

2021M3I3A10847472020R1A2C1005590

2024

10.1016/j.jechem.2023.10.041

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.89(2)
  • 58