| 研究課題/領域番号 |
21J15848
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 補助金 |
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| 応募区分 | 国内 |
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| 審査区分 |
小区分28030:ナノ材料科学関連
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| 研究機関 | 京都大学 |
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研究代表者 |
LI HAN 京都大学, 理学研究科, 特別研究員(DC2)
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| 研究期間 (年度) |
2021-04-28 – 2023-03-31
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| 研究課題ステータス |
完了 (2022年度)
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| 配分額 *注記 |
1,500千円 (直接経費: 1,500千円)
2022年度: 700千円 (直接経費: 700千円)
2021年度: 800千円 (直接経費: 800千円)
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| キーワード | Cu2-xSeyS1-y / plasmon / band engineering / water oxidation / hot carriers / Fermi level / electric field / crystal structure / chemical composition / copper vacancy |
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| 研究開始時の研究の概要 |
Current photoelectrocatalysis toward water splitting has the major drawbacks of solar light utilization only in UV-Vis region and low charge separation efficiency. Thus, the applicant proposes the novel plasmonic PEC device with response to Vis-IR-light to improve the charge separation efficiency and charge mobility by rational engineering of photoelectrode heterostructures based on optimized interfaces at CuSeS/CdS p-n heterojunction and CdS/SS ohmic contact. This novel photoelectrode material has much lower cost and higher efficiency of long-lived charge separation.
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| 研究実績の概要 |
In 2022, we designed a plasmonic photoelectrode comprising Cu2-xSeyS1-y and CdS for Near-Infrared (NIR)light driven water oxidation. We evaluated the performance of the photoelectrodes with band engineering of Cu2-xSeyS1-y which resulted in the optimized interfacial electric field between CdS and Cu2-xSeyS1-y. Cu2-xSeyS1-y with a deep fermi level (EF) showed good photoelectrocatalytic Oxygen evolution reaction (OER) activity under NIR light. We illustrated the hot carriers transfer by the transient absorption spectroscopy. Finally, we found that the band engineering of Cu2-xSeyS1-y controlled the NIR-induced photoelectrocatalytic OER. It was revealed that not only the deeper EF position but also the stronger interfacial electric field contributed to the photoelectrocatalytic OER.
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| 現在までの達成度 (段落) |
令和4年度が最終年度であるため、記入しない。
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| 今後の研究の推進方策 |
令和4年度が最終年度であるため、記入しない。
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