Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles

Micrometer-sized light-absorbing semiconductor particles (usually prepared by high temperature synthetic techniques) hold the desirable merits of high crystallinity, low concentrations of bulk defects, and a decreased grain boundary density to reduce bulk recombination of photocarriers. However, sol...

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Main Authors: Feng, Jianyong, Zhao, Xin, Ma, Su Su Khine, Wang, Danping, Chen, Zhong, Huang, Yizhong
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2017
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Online Access:https://hdl.handle.net/10356/83066
http://hdl.handle.net/10220/42411
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-830662023-07-14T15:50:37Z Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles Feng, Jianyong Zhao, Xin Ma, Su Su Khine Wang, Danping Chen, Zhong Huang, Yizhong School of Materials Science & Engineering Energy Research Institute @ NTU (ERI@N) Cadmium selenide Bismuth vanadate Micrometer-sized light-absorbing semiconductor particles (usually prepared by high temperature synthetic techniques) hold the desirable merits of high crystallinity, low concentrations of bulk defects, and a decreased grain boundary density to reduce bulk recombination of photocarriers. However, solar-water-splitting electrodes assembled using them as precursors always produce very low photocurrents. This could be due to the lack of an effective fabrication and/or modification protocol applicable to assemble these micrometer-sized semiconductor particles into suitable electrode configurations. A fast and simple fabrication scheme of drop-casting followed by the necking treatment is developed to enable the micrometer-sized precursor particles derived photoelectrodes to deliver appreciable photocurrent densities (>1 mA cm−2). By applying this fabrication scheme, photoelectrodes of solid-state reaction derived Mo doped BiVO4 (≈4 μm, modified with oxygen evolution catalysts) and commercial WO3 (size ranging from 100 nm to >10 μm) have yielded photocurrent densities higher than 1 mA cm−2, while the photoelectrode composed of commercial CdSe (≈10 μm) is able to produce a photocurrent density higher than 5 mA cm−2 (in a Na2S aqueous solution). This strategy provides a new possible way, in addition to the predominant route of nanostructuring, to construct efficient solar-water-splitting electrodes. MOE (Min. of Education, S’pore) Accepted version 2017-05-15T04:39:37Z 2019-12-06T15:11:08Z 2017-05-15T04:39:37Z 2019-12-06T15:11:08Z 2016 2016 Journal Article Feng, J., Zhao, X., Ma, S. S. K., Wang, D., Chen, Z., & Huang, Y. (2016). Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles. Advanced Materials Technologies,1(8), 1600119-. https://hdl.handle.net/10356/83066 http://hdl.handle.net/10220/42411 10.1002/admt.201600119 199968 en Advanced Materials Technologies © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the author created version of a work that has been peer reviewed and accepted for publication by Advanced Materials Technologies, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1002/admt.201600119]. 20 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Cadmium selenide
Bismuth vanadate
spellingShingle Cadmium selenide
Bismuth vanadate
Feng, Jianyong
Zhao, Xin
Ma, Su Su Khine
Wang, Danping
Chen, Zhong
Huang, Yizhong
Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles
description Micrometer-sized light-absorbing semiconductor particles (usually prepared by high temperature synthetic techniques) hold the desirable merits of high crystallinity, low concentrations of bulk defects, and a decreased grain boundary density to reduce bulk recombination of photocarriers. However, solar-water-splitting electrodes assembled using them as precursors always produce very low photocurrents. This could be due to the lack of an effective fabrication and/or modification protocol applicable to assemble these micrometer-sized semiconductor particles into suitable electrode configurations. A fast and simple fabrication scheme of drop-casting followed by the necking treatment is developed to enable the micrometer-sized precursor particles derived photoelectrodes to deliver appreciable photocurrent densities (>1 mA cm−2). By applying this fabrication scheme, photoelectrodes of solid-state reaction derived Mo doped BiVO4 (≈4 μm, modified with oxygen evolution catalysts) and commercial WO3 (size ranging from 100 nm to >10 μm) have yielded photocurrent densities higher than 1 mA cm−2, while the photoelectrode composed of commercial CdSe (≈10 μm) is able to produce a photocurrent density higher than 5 mA cm−2 (in a Na2S aqueous solution). This strategy provides a new possible way, in addition to the predominant route of nanostructuring, to construct efficient solar-water-splitting electrodes.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Feng, Jianyong
Zhao, Xin
Ma, Su Su Khine
Wang, Danping
Chen, Zhong
Huang, Yizhong
format Article
author Feng, Jianyong
Zhao, Xin
Ma, Su Su Khine
Wang, Danping
Chen, Zhong
Huang, Yizhong
author_sort Feng, Jianyong
title Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles
title_short Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles
title_full Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles
title_fullStr Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles
title_full_unstemmed Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles
title_sort fast and simple construction of efficient solar-water-splitting electrodes with micrometer-sized light-absorbing precursor particles
publishDate 2017
url https://hdl.handle.net/10356/83066
http://hdl.handle.net/10220/42411
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