Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity
The ability of band offsets at multiferroic/metal and multiferroic/electrolyte interfaces in controlling charge transfer and thus altering the photoactivity performance has sparked significant attention in solar energy conversion applications. Here, we demonstrate that the band offsets of the two in...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
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American Chemical Society
2019
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| _version_ | 1796961795905159168 |
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| author | Tan, Kok Hong Chen, Yun Wen Van, Chien Nguyen Wang, Hongliang Chen, Jhih Wei Lim, Fang Sheng Chew, Khian Hooi Zhan, Qian Wu, Chung Lin Chai, Siang Piao Chu, Ying Hao Chang, Wei Sea |
| author_facet | Tan, Kok Hong Chen, Yun Wen Van, Chien Nguyen Wang, Hongliang Chen, Jhih Wei Lim, Fang Sheng Chew, Khian Hooi Zhan, Qian Wu, Chung Lin Chai, Siang Piao Chu, Ying Hao Chang, Wei Sea |
| author_sort | Tan, Kok Hong |
| collection | UM |
| description | The ability of band offsets at multiferroic/metal and multiferroic/electrolyte interfaces in controlling charge transfer and thus altering the photoactivity performance has sparked significant attention in solar energy conversion applications. Here, we demonstrate that the band offsets of the two interfaces play the key role in determining charge transport direction in a downward self-polarized BFO film. Electrons tend to move to BFO/electrolyte interface for water reduction. Our experimental and first-principle calculations reveal that the presence of neodymium (Nd) dopants in BFO enhances the photoelectrochemical performance by reduction of the local electron-hole pair recombination sites and modulation of the band gap to improve the visible light absorption. This opens a promising route to the heterostructure design by modulating the band gap to promote efficient charge transfer. © 2018 American Chemical Society. |
| first_indexed | 2024-03-06T05:59:29Z |
| format | Article |
| id | um.eprints-23303 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:59:29Z |
| publishDate | 2019 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | um.eprints-233032020-01-03T06:17:11Z http://eprints.um.edu.my/23303/ Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity Tan, Kok Hong Chen, Yun Wen Van, Chien Nguyen Wang, Hongliang Chen, Jhih Wei Lim, Fang Sheng Chew, Khian Hooi Zhan, Qian Wu, Chung Lin Chai, Siang Piao Chu, Ying Hao Chang, Wei Sea QC Physics TJ Mechanical engineering and machinery TP Chemical technology The ability of band offsets at multiferroic/metal and multiferroic/electrolyte interfaces in controlling charge transfer and thus altering the photoactivity performance has sparked significant attention in solar energy conversion applications. Here, we demonstrate that the band offsets of the two interfaces play the key role in determining charge transport direction in a downward self-polarized BFO film. Electrons tend to move to BFO/electrolyte interface for water reduction. Our experimental and first-principle calculations reveal that the presence of neodymium (Nd) dopants in BFO enhances the photoelectrochemical performance by reduction of the local electron-hole pair recombination sites and modulation of the band gap to improve the visible light absorption. This opens a promising route to the heterostructure design by modulating the band gap to promote efficient charge transfer. © 2018 American Chemical Society. American Chemical Society 2019 Article PeerReviewed Tan, Kok Hong and Chen, Yun Wen and Van, Chien Nguyen and Wang, Hongliang and Chen, Jhih Wei and Lim, Fang Sheng and Chew, Khian Hooi and Zhan, Qian and Wu, Chung Lin and Chai, Siang Piao and Chu, Ying Hao and Chang, Wei Sea (2019) Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity. ACS Applied Materials & Interfaces, 11 (1). pp. 1655-1664. ISSN 1944-8244, DOI https://doi.org/10.1021/acsami.8b17758 <https://doi.org/10.1021/acsami.8b17758>. https://doi.org/10.1021/acsami.8b17758 doi:10.1021/acsami.8b17758 |
| spellingShingle | QC Physics TJ Mechanical engineering and machinery TP Chemical technology Tan, Kok Hong Chen, Yun Wen Van, Chien Nguyen Wang, Hongliang Chen, Jhih Wei Lim, Fang Sheng Chew, Khian Hooi Zhan, Qian Wu, Chung Lin Chai, Siang Piao Chu, Ying Hao Chang, Wei Sea Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity |
| title | Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity |
| title_full | Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity |
| title_fullStr | Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity |
| title_full_unstemmed | Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity |
| title_short | Energy Band Gap Modulation in Nd-Doped BiFeO3/SrRuO3 Heteroepitaxy for Visible Light Photoelectrochemical Activity |
| title_sort | energy band gap modulation in nd doped bifeo3 srruo3 heteroepitaxy for visible light photoelectrochemical activity |
| topic | QC Physics TJ Mechanical engineering and machinery TP Chemical technology |
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