Issue 46, 2019, Issue in Progress
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RSC Advances

Enhanced photoelectrochemical performance of LaFeO3 photocathode with Au buffer layer

Peipei Wang,a   Yanfang He,a   Yan Mi, ORCID logo b   Jianfei Zhu,a   Faling Zhang,a   Yuan Liu,*a   Ying Yang,a   Mingming Chen ORCID logo a  and  Dawei Cao ORCID logo *a  

* Corresponding authors

a Department of Physics, Faculty of Science, Jiangsu University, Zhenjiang 212013, P. R. China
E-mail: yliu@ujs.edu.cn, dwcao@ujs.edu.cn

b Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning 530006, P. R. China

Abstract

Due to an appropriate band gap of 2.07 eV, perovskite LaFeO3 (LFO) is an alternative candidate for high-efficiency photoelectrochemical (PEC) systems. However, the photocurrent of the LFO photocathode is too low to be practical. Herein, we prepared a LFO film with high crystal quality by inserting an Au thin layer between LFO and FTO in the LFO/FTO photocathode. Accordingly, an effective improvement PEC performance could be obtained and the photocurrent density of the FTO/Au/LFO electrode was increased to −19.60 μA cm−2 at 0.6 V vs. RHE, which is 4.1 times higher than that of pristine FTO/LFO electrode. Based on the experimental and theoretical analysis, the enhancement of the photocurrent was attributed to the strong light harvesting, enhanced charge separation, and increased charge-collection efficiency of the Au/LFO structure. This work provides a promising strategy to develop high-efficiency PEC electrodes, and has potential to be applied in the visible-light water splitting area.

Graphical abstract: Enhanced photoelectrochemical performance of LaFeO3 photocathode with Au buffer layer

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Article information

DOI
https://doi.org/10.1039/C9RA05521E
Article type
Paper
Submitted
18 Jul 2019
Accepted
22 Aug 2019
First published
27 Aug 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 26780-26786

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Enhanced photoelectrochemical performance of LaFeO3 photocathode with Au buffer layer

P. Wang, Y. He, Y. Mi, J. Zhu, F. Zhang, Y. Liu, Y. Yang, M. Chen and D. Cao, RSC Adv., 2019, 9, 26780 DOI: 10.1039/C9RA05521E

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