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Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting

New insight into junction-based designs for efficient charge separation is vitally important for current solar energy conversion research. Herein, an anatase–rutile phase junction is elaborately introduced into TiO(2) films by rapid thermal annealing treatment and the roles of phase junction on char...

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Autores principales: Li, Ailong, Wang, Zhiliang, Yin, Heng, Wang, Shengyang, Yan, Pengli, Huang, Baokun, Wang, Xiuli, Li, Rengui, Zong, Xu, Han, Hongxian, Li, Can
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6022233/
https://www.ncbi.nlm.nih.gov/pubmed/30034748
http://dx.doi.org/10.1039/c6sc01611a
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author Li, Ailong
Wang, Zhiliang
Yin, Heng
Wang, Shengyang
Yan, Pengli
Huang, Baokun
Wang, Xiuli
Li, Rengui
Zong, Xu
Han, Hongxian
Li, Can
author_facet Li, Ailong
Wang, Zhiliang
Yin, Heng
Wang, Shengyang
Yan, Pengli
Huang, Baokun
Wang, Xiuli
Li, Rengui
Zong, Xu
Han, Hongxian
Li, Can
author_sort Li, Ailong
collection PubMed
description New insight into junction-based designs for efficient charge separation is vitally important for current solar energy conversion research. Herein, an anatase–rutile phase junction is elaborately introduced into TiO(2) films by rapid thermal annealing treatment and the roles of phase junction on charge separation and transfer are studied in detail. A combined study of transient absorption spectroscopy, electrochemical and photoelectrochemical (PEC) measurements reveals that appropriate phase alignment is essential for unidirectional charge transfer, and a junction interface with minimized trap states is crucial to liberate the charge separation potential of the phase junction. By tailored control of phase alignment and interface structure, an optimized TiO(2) film with an appropriately introduced phase junction shows superior performance in charge separation and transfer, hence achieving ca. 3 and 9 times photocurrent density enhancement compared to pristine anatase and rutile phase TiO(2) electrodes, respectively. This work demonstrates the great potential of phase junctions for efficient charge separation and transfer in solar energy conversion applications.
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spelling pubmed-60222332018-07-20 Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting Li, Ailong Wang, Zhiliang Yin, Heng Wang, Shengyang Yan, Pengli Huang, Baokun Wang, Xiuli Li, Rengui Zong, Xu Han, Hongxian Li, Can Chem Sci Chemistry New insight into junction-based designs for efficient charge separation is vitally important for current solar energy conversion research. Herein, an anatase–rutile phase junction is elaborately introduced into TiO(2) films by rapid thermal annealing treatment and the roles of phase junction on charge separation and transfer are studied in detail. A combined study of transient absorption spectroscopy, electrochemical and photoelectrochemical (PEC) measurements reveals that appropriate phase alignment is essential for unidirectional charge transfer, and a junction interface with minimized trap states is crucial to liberate the charge separation potential of the phase junction. By tailored control of phase alignment and interface structure, an optimized TiO(2) film with an appropriately introduced phase junction shows superior performance in charge separation and transfer, hence achieving ca. 3 and 9 times photocurrent density enhancement compared to pristine anatase and rutile phase TiO(2) electrodes, respectively. This work demonstrates the great potential of phase junctions for efficient charge separation and transfer in solar energy conversion applications. Royal Society of Chemistry 2016-09-01 2016-06-09 /pmc/articles/PMC6022233/ /pubmed/30034748 http://dx.doi.org/10.1039/c6sc01611a Text en This journal is © The Royal Society of Chemistry 2016 http://creativecommons.org/licenses/by/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0)
spellingShingle Chemistry
Li, Ailong
Wang, Zhiliang
Yin, Heng
Wang, Shengyang
Yan, Pengli
Huang, Baokun
Wang, Xiuli
Li, Rengui
Zong, Xu
Han, Hongxian
Li, Can
Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting
title Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting
title_full Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting
title_fullStr Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting
title_full_unstemmed Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting
title_short Understanding the anatase–rutile phase junction in charge separation and transfer in a TiO(2) electrode for photoelectrochemical water splitting
title_sort understanding the anatase–rutile phase junction in charge separation and transfer in a tio(2) electrode for photoelectrochemical water splitting
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6022233/
https://www.ncbi.nlm.nih.gov/pubmed/30034748
http://dx.doi.org/10.1039/c6sc01611a
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