| Cu도핑을 통한 In/Cu:ZnS 양자점 합성법 개발 및 광화학적 수소생성 반응 활용 | |||||
| 작성자 | 전** | 작성일 | 2021-11-24 | 조회수 | 230 |
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Cu도핑을 통한 In/Cu:ZnS 양자점 합성법 개발 및 광화학적 수소생성 반응 활용
"Controlled Photoinduced Electron Transfer from InP/ZnS Quantum Dots through Cu Doping: A New Prototype for the Visible-Light Photocatalytic Hydrogen Evolution Reaction", Nano Letters, 20, 6263-6271(2020)
DOI : 10.1021/acs.nanolett.0c00983
Abstract
Photoexcited electron extraction from semiconductors can be useful for converting solar energy into useful forms of energy. Although InP quantum dots (QDs) are considered alternative materials for solar energy conversion, the inherent instability of bare InP QDs demands the use of passivation layers such as ZnS for practical applications, which impedes carrier extraction from the QDs. Here, we demonstrate that Cu-doped InP/ZnS (InP/Cu:ZnS) QDs improve the electron transfer ability due to hole capture by Cu dopants. Steady-state and time-resolved photoluminescence studies confirmed that electrons were effectively transferred from the InP/Cu:ZnS QDs to a benzoquinone acceptor by retarding the electron?hole recombination within the QD. We evaluated the photocatalytic H2 evolution performance of InP/Cu:ZnS QDs under visible light, which showed outstanding photocatalytic H2 evolution activity and stability under visible light illumination. The photocatalytic activity was preserved even in the absence of a cocatalyst.
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