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Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm
Recent years have witnessed an increasing interest in highly-efficient absorbers of visible light for the conversion of solar energy into electrochemical energy. This study presents a TiO(2)-Au bilayer that consists of a rough Au film under a TiO(2) film, which aims to enhance the photocurrent of Ti...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5016800/ https://www.ncbi.nlm.nih.gov/pubmed/27608836 http://dx.doi.org/10.1038/srep33049 |
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author | Tan, Furui Li, Tenghao Wang, Ning Lai, Sin Ki Tsoi, Chi Chung Yu, Weixing Zhang, Xuming |
author_facet | Tan, Furui Li, Tenghao Wang, Ning Lai, Sin Ki Tsoi, Chi Chung Yu, Weixing Zhang, Xuming |
author_sort | Tan, Furui |
collection | PubMed |
description | Recent years have witnessed an increasing interest in highly-efficient absorbers of visible light for the conversion of solar energy into electrochemical energy. This study presents a TiO(2)-Au bilayer that consists of a rough Au film under a TiO(2) film, which aims to enhance the photocurrent of TiO(2) over the whole visible region and may be the first attempt to use rough Au films to sensitize TiO(2). Experiments show that the bilayer structure gives the optimal optical and photoelectrochemical performance when the TiO(2) layer is 30 nm thick and the Au film is 100 nm, measuring the absorption 80–90% over 400–800 nm and the photocurrent intensity of 15 μA·cm(−2), much better than those of the TiO(2)-AuNP hybrid (i.e., Au nanoparticle covered by the TiO(2) film) and the bare TiO(2) film. The superior properties of the TiO(2)-Au bilayer can be attributed to the rough Au film as the plasmonic visible-light sensitizer and the photoactive TiO(2) film as the electron accepter. As the Au film is fully covered by the TiO(2) film, the TiO(2)-Au bilayer avoids the photocorrosion and leakage of Au materials and is expected to be stable for long-term operation, making it an excellent photoelectrode for the conversion of solar energy into electrochemical energy in the applications of water splitting, photocatalysis and photosynthesis. |
format | Online Article Text |
id | pubmed-5016800 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50168002016-09-12 Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm Tan, Furui Li, Tenghao Wang, Ning Lai, Sin Ki Tsoi, Chi Chung Yu, Weixing Zhang, Xuming Sci Rep Article Recent years have witnessed an increasing interest in highly-efficient absorbers of visible light for the conversion of solar energy into electrochemical energy. This study presents a TiO(2)-Au bilayer that consists of a rough Au film under a TiO(2) film, which aims to enhance the photocurrent of TiO(2) over the whole visible region and may be the first attempt to use rough Au films to sensitize TiO(2). Experiments show that the bilayer structure gives the optimal optical and photoelectrochemical performance when the TiO(2) layer is 30 nm thick and the Au film is 100 nm, measuring the absorption 80–90% over 400–800 nm and the photocurrent intensity of 15 μA·cm(−2), much better than those of the TiO(2)-AuNP hybrid (i.e., Au nanoparticle covered by the TiO(2) film) and the bare TiO(2) film. The superior properties of the TiO(2)-Au bilayer can be attributed to the rough Au film as the plasmonic visible-light sensitizer and the photoactive TiO(2) film as the electron accepter. As the Au film is fully covered by the TiO(2) film, the TiO(2)-Au bilayer avoids the photocorrosion and leakage of Au materials and is expected to be stable for long-term operation, making it an excellent photoelectrode for the conversion of solar energy into electrochemical energy in the applications of water splitting, photocatalysis and photosynthesis. Nature Publishing Group 2016-09-09 /pmc/articles/PMC5016800/ /pubmed/27608836 http://dx.doi.org/10.1038/srep33049 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Tan, Furui Li, Tenghao Wang, Ning Lai, Sin Ki Tsoi, Chi Chung Yu, Weixing Zhang, Xuming Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm |
title | Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm |
title_full | Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm |
title_fullStr | Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm |
title_full_unstemmed | Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm |
title_short | Rough gold films as broadband absorbers for plasmonic enhancement of TiO(2) photocurrent over 400–800 nm |
title_sort | rough gold films as broadband absorbers for plasmonic enhancement of tio(2) photocurrent over 400–800 nm |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5016800/ https://www.ncbi.nlm.nih.gov/pubmed/27608836 http://dx.doi.org/10.1038/srep33049 |
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