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Title: Interstitial Lithium Doping in BiVO4 Thin Film Photoanode for Enhanced Solar Water Splitting Activity

Abstract

As one of the most promising candidates of photoanode material, bismuth vanadate (BiVO4) has been paid wide attention and achieved remarkable progress. However, the full exploitation of solar-energy-conversion potential of bismuth vanadate (BiVO4) is still limited by poor charge transport. Introducing dopants into BiVO4 has been proved to be a feasible method to improve the photoelectrochemical water splitting performance. In this work, lithium is introduced as an interstitial dopant to crystalline BiVO4 thin film photoanode, with the aid of pulsed laser deposition (PLD). Solid-state transport characterization demonstrates increased carrier density and electron conductivity in BiVO4 bulk due to interstitial lithium doping, which also increased the photocurrent and photon-to-current conversion efficiency both by up to 20% for solar water splitting. Finally, computational results based on density functional theory determine the effect of lithium doping on the electronic and atomic structures of BiVO4 and verify the role of lithium dopant as a shallow donor that improves the conductivity of BiVO4.

Authors:
ORCiD logo [1];  [2];  [2]; ORCiD logo [3];  [3]; ORCiD logo [2]; ORCiD logo [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
  2. Univ. of California, Santa Cruz, CA (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1661644
Report Number(s):
BNL-219833-2020-JAAM
Journal ID: ISSN 0897-4756
Grant/Contract Number:  
SC0012704; CHE-1904547; AST 1828315; ACI1548562
Resource Type:
Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 32; Journal Issue: 15; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhou, Chenyu, Sanders-Bellis, Zachary, Smart, Tyler J., Zhang, Wenrui, Zhang, Lihua, Ping, Yuan, and Liu, Mingzhao. Interstitial Lithium Doping in BiVO4 Thin Film Photoanode for Enhanced Solar Water Splitting Activity. United States: N. p., 2020. Web. doi:10.1021/acs.chemmater.0c01481.
Zhou, Chenyu, Sanders-Bellis, Zachary, Smart, Tyler J., Zhang, Wenrui, Zhang, Lihua, Ping, Yuan, & Liu, Mingzhao. Interstitial Lithium Doping in BiVO4 Thin Film Photoanode for Enhanced Solar Water Splitting Activity. United States. https://doi.org/10.1021/acs.chemmater.0c01481
Zhou, Chenyu, Sanders-Bellis, Zachary, Smart, Tyler J., Zhang, Wenrui, Zhang, Lihua, Ping, Yuan, and Liu, Mingzhao. Tue . "Interstitial Lithium Doping in BiVO4 Thin Film Photoanode for Enhanced Solar Water Splitting Activity". United States. https://doi.org/10.1021/acs.chemmater.0c01481. https://www.osti.gov/servlets/purl/1661644.
@article{osti_1661644,
title = {Interstitial Lithium Doping in BiVO4 Thin Film Photoanode for Enhanced Solar Water Splitting Activity},
author = {Zhou, Chenyu and Sanders-Bellis, Zachary and Smart, Tyler J. and Zhang, Wenrui and Zhang, Lihua and Ping, Yuan and Liu, Mingzhao},
abstractNote = {As one of the most promising candidates of photoanode material, bismuth vanadate (BiVO4) has been paid wide attention and achieved remarkable progress. However, the full exploitation of solar-energy-conversion potential of bismuth vanadate (BiVO4) is still limited by poor charge transport. Introducing dopants into BiVO4 has been proved to be a feasible method to improve the photoelectrochemical water splitting performance. In this work, lithium is introduced as an interstitial dopant to crystalline BiVO4 thin film photoanode, with the aid of pulsed laser deposition (PLD). Solid-state transport characterization demonstrates increased carrier density and electron conductivity in BiVO4 bulk due to interstitial lithium doping, which also increased the photocurrent and photon-to-current conversion efficiency both by up to 20% for solar water splitting. Finally, computational results based on density functional theory determine the effect of lithium doping on the electronic and atomic structures of BiVO4 and verify the role of lithium dopant as a shallow donor that improves the conductivity of BiVO4.},
doi = {10.1021/acs.chemmater.0c01481},
journal = {Chemistry of Materials},
number = 15,
volume = 32,
place = {United States},
year = {Tue Jul 14 00:00:00 EDT 2020},
month = {Tue Jul 14 00:00:00 EDT 2020}
}

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