2021 Fiscal Year Annual Research Report
Colloidal synthesis of all-inorganic tin-based perovskite quantum dots and their application for solar cells
| Project/Area Number |
21H01743
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
孫 洪涛 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主幹研究員 (30571822)
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| Co-Investigator(Kenkyū-buntansha) |
KHADKA Dhruba 国立研究開発法人物質・材料研究機構, エネルギー・環境材料研究拠点, 研究員 (70793173)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | perovskite quantum dots / quantum dots |
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| Outline of Annual Research Achievements |
The purpose of this project is to develop an innovative approach to explore and synthesize high-quality all-inorganic tin-based halide perovskite quantum dots for solar cells. In 2021, the defect formation mechanism was evaluated by density functional theory, and the synthesis parameters, especially the effect of capping agent on the properties of perovskite quantum dots was investigated. Introducing a small amount of zwitterionic phosphatidylcholine in the reaction was found to be important for regulating the growth kinetics of CsSnX3 perovskite quantum dots, which otherwise merely leads to the formation of large-sized powders.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
(1) The formation of intermediate complexes between zwitterionic phosphatidylcholine and the precursors and the steric hindrance effect of branched fatty acid side-chains of phosphatidylcholine were identified to be the reason for regulating the growth kinetics of CsSnX3. This may inspire more research on the synthesis of high-quality tin-based perovskite quantum dots. This finding was published in Nanoscale.
(2) The theoretical calculation points to a new way to obtain high-quality tin-based perovskite quantum dots, which is being prepared for submission to an international peer-reviewed journal.
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| Strategy for Future Research Activity |
On one hand, the synthetic strategy will be further optimized, and the surface passivation of these perovskite quantum dots will be carried out. On the other hand, the use of perovskite quantum dots for constructing solar cells will be tried.
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