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Robust Protection of III–V Nanowires in Water Splitting by a Thin Compact TiO(2) Layer
[Image: see text] Narrow-band-gap III–V semiconductor nanowires (NWs) with a suitable band structure and strong light-trapping ability are ideal for high-efficiency low-cost solar water-splitting systems. However, due to their nanoscale dimension, they suffer more severe corrosion by the electrolyte...
Autores principales: | , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8289235/ https://www.ncbi.nlm.nih.gov/pubmed/34160197 http://dx.doi.org/10.1021/acsami.1c03903 |
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author | Cui, Fan Zhang, Yunyan Fonseka, H. Aruni Promdet, Premrudee Channa, Ali Imran Wang, Mingqing Xia, Xueming Sathasivam, Sanjayan Liu, Hezhuang Parkin, Ivan P. Yang, Hui Li, Ting Choy, Kwang-Leong Wu, Jiang Blackman, Christopher Sanchez, Ana M. Liu, Huiyun |
author_facet | Cui, Fan Zhang, Yunyan Fonseka, H. Aruni Promdet, Premrudee Channa, Ali Imran Wang, Mingqing Xia, Xueming Sathasivam, Sanjayan Liu, Hezhuang Parkin, Ivan P. Yang, Hui Li, Ting Choy, Kwang-Leong Wu, Jiang Blackman, Christopher Sanchez, Ana M. Liu, Huiyun |
author_sort | Cui, Fan |
collection | PubMed |
description | [Image: see text] Narrow-band-gap III–V semiconductor nanowires (NWs) with a suitable band structure and strong light-trapping ability are ideal for high-efficiency low-cost solar water-splitting systems. However, due to their nanoscale dimension, they suffer more severe corrosion by the electrolyte solution than the thin-film counterparts. Thus, short-term durability is the major obstacle for using these NWs for practical water-splitting applications. Here, we demonstrated for the first time that a thin layer (∼7 nm thick) of compact TiO(2) deposited by atomic layer deposition can provide robust protection to III–V NWs. The protected GaAs NWs maintain 91.4% of its photoluminescence intensity after 14 months of storage in ambient atmosphere, which suggests the TiO(2) layer is pinhole-free. Working as a photocathode for water splitting, they exhibited a 45% larger photocurrent density compared with unprotected counterparts and a high Faraday efficiency of 91% and can also maintain a record-long highly stable performance among narrow-band-gap III–V NW photoelectrodes; after 67 h photoelectrochemical stability test reaction in a strong acid electrolyte solution (pH = 1), they show no apparent indication of corrosion, which is in stark contrast to the unprotected NWs that fully failed after 35 h. These findings provide an effective way to enhance both stability and performance of III–V NW-based photoelectrodes, which are highly important for practical applications in solar-energy-based water-splitting systems. |
format | Online Article Text |
id | pubmed-8289235 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-82892352021-07-20 Robust Protection of III–V Nanowires in Water Splitting by a Thin Compact TiO(2) Layer Cui, Fan Zhang, Yunyan Fonseka, H. Aruni Promdet, Premrudee Channa, Ali Imran Wang, Mingqing Xia, Xueming Sathasivam, Sanjayan Liu, Hezhuang Parkin, Ivan P. Yang, Hui Li, Ting Choy, Kwang-Leong Wu, Jiang Blackman, Christopher Sanchez, Ana M. Liu, Huiyun ACS Appl Mater Interfaces [Image: see text] Narrow-band-gap III–V semiconductor nanowires (NWs) with a suitable band structure and strong light-trapping ability are ideal for high-efficiency low-cost solar water-splitting systems. However, due to their nanoscale dimension, they suffer more severe corrosion by the electrolyte solution than the thin-film counterparts. Thus, short-term durability is the major obstacle for using these NWs for practical water-splitting applications. Here, we demonstrated for the first time that a thin layer (∼7 nm thick) of compact TiO(2) deposited by atomic layer deposition can provide robust protection to III–V NWs. The protected GaAs NWs maintain 91.4% of its photoluminescence intensity after 14 months of storage in ambient atmosphere, which suggests the TiO(2) layer is pinhole-free. Working as a photocathode for water splitting, they exhibited a 45% larger photocurrent density compared with unprotected counterparts and a high Faraday efficiency of 91% and can also maintain a record-long highly stable performance among narrow-band-gap III–V NW photoelectrodes; after 67 h photoelectrochemical stability test reaction in a strong acid electrolyte solution (pH = 1), they show no apparent indication of corrosion, which is in stark contrast to the unprotected NWs that fully failed after 35 h. These findings provide an effective way to enhance both stability and performance of III–V NW-based photoelectrodes, which are highly important for practical applications in solar-energy-based water-splitting systems. American Chemical Society 2021-06-23 2021-07-07 /pmc/articles/PMC8289235/ /pubmed/34160197 http://dx.doi.org/10.1021/acsami.1c03903 Text en © 2021 The Authors. Published by American Chemical Society Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Cui, Fan Zhang, Yunyan Fonseka, H. Aruni Promdet, Premrudee Channa, Ali Imran Wang, Mingqing Xia, Xueming Sathasivam, Sanjayan Liu, Hezhuang Parkin, Ivan P. Yang, Hui Li, Ting Choy, Kwang-Leong Wu, Jiang Blackman, Christopher Sanchez, Ana M. Liu, Huiyun Robust Protection of III–V Nanowires in Water Splitting by a Thin Compact TiO(2) Layer |
title | Robust
Protection of III–V Nanowires in Water
Splitting by a Thin Compact TiO(2) Layer |
title_full | Robust
Protection of III–V Nanowires in Water
Splitting by a Thin Compact TiO(2) Layer |
title_fullStr | Robust
Protection of III–V Nanowires in Water
Splitting by a Thin Compact TiO(2) Layer |
title_full_unstemmed | Robust
Protection of III–V Nanowires in Water
Splitting by a Thin Compact TiO(2) Layer |
title_short | Robust
Protection of III–V Nanowires in Water
Splitting by a Thin Compact TiO(2) Layer |
title_sort | robust
protection of iii–v nanowires in water
splitting by a thin compact tio(2) layer |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8289235/ https://www.ncbi.nlm.nih.gov/pubmed/34160197 http://dx.doi.org/10.1021/acsami.1c03903 |
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