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...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2017
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| Online Access: | https://hdl.handle.net/10356/83066 http://hdl.handle.net/10220/42411 |
| _version_ | 1824454040641077248 |
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| author | Feng, Jianyong Zhao, Xin Ma, Su Su Khine Wang, Danping Chen, Zhong Huang, Yizhong |
| 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 |
| author_sort | Feng, Jianyong |
| collection | NTU |
| 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. |
| first_indexed | 2025-02-19T03:16:00Z |
| format | Journal Article |
| id | ntu-10356/83066 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:16:00Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | 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 |
| topic | Cadmium selenide Bismuth vanadate |
| url | https://hdl.handle.net/10356/83066 http://hdl.handle.net/10220/42411 |
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