dc.citation.conferencePlace |
SI |
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dc.citation.title |
SICC10: 10th Singapore International Chemistry Conference |
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dc.contributor.author |
Yoon, Ki-Yong |
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dc.contributor.author |
Jang, Ji-Hyun |
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dc.date.accessioned |
2024-02-01T00:40:19Z |
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dc.date.available |
2024-02-01T00:40:19Z |
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dc.date.created |
2019-01-11 |
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dc.date.issued |
2018-12-19 |
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dc.description.abstract |
In this study, we report a strong correlation between the formation energy related with the crystal disorder and the water splitting performance in Si:Ti-codoped-Fe2O3. Due to the balance of the atomic radius and the Fe charge dispersion during the structural evolution process of the dual-doped hematite system, the guest Si-dopant was easily incorporated into Ti-doped hematite without destroying the symmetry of the host Ti-hematite, and thus successfully increased the charge mobility and improved the PEC performance of Si:Ti-Fe2O3. A photocurrent density of 4.5 mA cm-2 at 1.23 VRHE was achieved in the optimized Si:Ti-hematite, which is 7.5 times higher than that of the conventional hematite rod (0.6 mA cm-2 at 1.23 VRHEM), without using any expensive process or equipment, thus not compromising the cost-effectiveness of hematite. Our systematic approach made Si-doping into Ti-Fe2O3 possible by a simple and inexpensive thermal diffusion method, which may substitute for the currently representative but cost-inefficient Si-doping methods. The strategy explored in this study can be extended to other co-doping systems of metal oxide photoanodes for efficient PEC systems to achieve a substantial improvement in PEC performance. |
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dc.identifier.bibliographicCitation |
SICC10: 10th Singapore International Chemistry Conference |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/80254 |
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dc.language |
영어 |
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dc.publisher |
Singapore International Chemistry |
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dc.title |
Formation energy control of Si-doped hematite for efficient water splitting |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2018-12-16 |
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