Water-soluble ZnSe/ZnS : Mn/ZnS quantum dots convert UV to visible light for improved Si solar cell efficiency
| Autor: | Naoteru Shigekawa, Hisaaki Nishimura, Shoichi Kawai, Tomomi Takagi, Susumu Sobue, Takaya Maekawa, DaeGwi Kim, Kazushi Enomoto |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
太陽電池
Photoluminescence Materials science 紫外線 business.industry Energy conversion efficiency Quantum yield 可視光線 General Chemistry law.invention UV solar cell Spectral sensitivity Solar cell efficiency Quantum dot law Solar cell Materials Chemistry Optoelectronics business visible light Visible spectrum |
| Zdroj: | Journal of Materials Chemistry C. 9(2):693-701 |
| ISSN: | 2050-7526 |
| Popis: | The sensitivity of Si solar cells to the UV portion of the solar spectrum is low, and must be increased to further improve their efficiencies. In this study, water-soluble ZnSe/ZnS:Mn/ZnS core/shell/shell quantum dots (QDs) capable of converting UV into visible light were synthesised by a hydrothermal method. A photoluminescence quantum yield of 84% was achieved by carefully investigating and optimising the QD preparation conditions. Furthemore, we prepared wavelength-conversion glass containing the ZnSe/ZnS:Mn/ZnS QDs dispersed in sol–gel glass and applied it to Si solar cells. As a result, the spectral sensitivity of the Si solar cell at wavelengths shorter than 400 nm was significantly improved, and the amount of power generated (conversion efficiency) was increased by 7.4% compared with that of the cell without the wavelength-conversion glass coating. |
| Databáze: | OpenAIRE |
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