Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films
When Ho3+ ions are substituted at Sr2+ sites in SrTiO3 (STO), the excess positive charges are compensated via three complementary routes: (1) strontium vacancies, (2) titanium vacancies, and (3) conduction electrons. In this study, we show that the photoelectrochemical properties of Ho-doped STO fil...
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sg-ntu-dr.10356-957762023-02-28T19:24:39Z Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films Dong, Wen Shen, Mingrong Wu, Tom Zheng, Fengang Zhao, Long Fang, Liang School of Physical and Mathematical Sciences DRNTU::Science::Chemistry::Biochemistry::Spectroscopy When Ho3+ ions are substituted at Sr2+ sites in SrTiO3 (STO), the excess positive charges are compensated via three complementary routes: (1) strontium vacancies, (2) titanium vacancies, and (3) conduction electrons. In this study, we show that the photoelectrochemical properties of Ho-doped STO films are dependent on the charge compensation mechanisms. The compensation mechanism via the titanium vacancies exhibits the highest photocurrent density, which is 1.7 times higher than that of the pure STO sample. Based on the measured dielectric properties and electrochemical impedance spectroscopy data, we propose that the enhanced dielectric constant of the films can enlarge the width of the space charge region at the film/liquid interface, which eventually leads to the increase of the photocurrent density. Further enhancement of photocurrent density is obtained in the samples decorated with appropriate amounts of Pt nanoparticles, showing the advantage of composites for achieving the efficient photoelectrochemical property. Published version 2013-06-07T06:18:50Z 2019-12-06T19:21:18Z 2013-06-07T06:18:50Z 2019-12-06T19:21:18Z 2013 2013 Journal Article Zhao, L., Fang, L., Dong, W., Zheng, F., Shen, M., & Wu, T. (2013). Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films. Applied Physics Letters, 102(12). https://hdl.handle.net/10356/95776 http://hdl.handle.net/10220/10074 10.1063/1.4798829 en Applied physics letters © 2013 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4798829]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
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DRNTU::Science::Chemistry::Biochemistry::Spectroscopy Dong, Wen Shen, Mingrong Wu, Tom Zheng, Fengang Zhao, Long Fang, Liang Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films |
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When Ho3+ ions are substituted at Sr2+ sites in SrTiO3 (STO), the excess positive charges are compensated via three complementary routes: (1) strontium vacancies, (2) titanium vacancies, and (3) conduction electrons. In this study, we show that the photoelectrochemical properties of Ho-doped STO films are dependent on the charge compensation mechanisms. The compensation mechanism via the titanium vacancies exhibits the highest photocurrent density, which is 1.7 times higher than that of the pure STO sample. Based on the measured dielectric properties and electrochemical impedance spectroscopy data, we propose that the enhanced dielectric constant of the films can enlarge the width of the space charge region at the film/liquid interface, which eventually leads to the increase of the photocurrent density. Further enhancement of photocurrent density is obtained in the samples decorated with appropriate amounts of Pt nanoparticles, showing the advantage of composites for achieving the efficient photoelectrochemical property. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Dong, Wen Shen, Mingrong Wu, Tom Zheng, Fengang Zhao, Long Fang, Liang |
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Article |
author |
Dong, Wen Shen, Mingrong Wu, Tom Zheng, Fengang Zhao, Long Fang, Liang |
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Dong, Wen |
title |
Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films |
title_short |
Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films |
title_full |
Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films |
title_fullStr |
Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films |
title_full_unstemmed |
Effect of charge compensation on the photoelectrochemical properties of Ho-doped SrTiO3 films |
title_sort |
effect of charge compensation on the photoelectrochemical properties of ho-doped srtio3 films |
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2013 |
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https://hdl.handle.net/10356/95776 http://hdl.handle.net/10220/10074 |
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