2022 Fiscal Year Final Research Report
Exploring blue-light emitting non-perovskite iodides: low-dimensional arrangement of CuI4 tetrahedrons.
| Project/Area Number |
20K21242
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
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| Research Institution | Chubu University |
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Principal Investigator |
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| Project Period (FY) |
2020-07-30 – 2023-03-31
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| Keywords | ヨウ化物 / CuI4四面体 / 励起子発光 / 青色発光 / ワイドギャップ半導体 |
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| Outline of Final Research Achievements |
Thin films of Cu-based iodides with a crystal structure that is constructed by a low-dimensional arrangement of CuI4 tetrahedra were prepared and their photoluminescence (PL) properties were investigated. As expected, thin films of Cu2ZnI4, which consists of a two-dimensional network of the CuI4 tetrahedra, showed strong blue-violet photoluminescence at room temperature. Furthermore, the luminescence intensity was enhanced by substituting bromine for iodine, suggesting that the combination of the low-dimensional CuI4 tetrahedral arrangement and the bromine substitution can realize a Cu-based iodide with extremely high luminescence efficiency.
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| Free Research Field |
固体物理化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究によって，CuI4四面体が低次元配列したCu系ヨウ化物の一部を臭素で置換すると，発光効率の高いヨウ化物が得られるという設計指針が得られた．加えて，Cu系ヨウ化物は薄膜形成に高い温度が不要であるので，実用的な利点も有している．この研究で得られた指針は一般性を有していると考えられる．この指針にしたがって材料探索をすれば，従来材料と比して飛躍的に高い発光効率のヨウ化物半導体の発見に繋がる可能性がある．
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