2021 Fiscal Year Final Research Report
High-pressure synthesis of a novel nitride phosphor in the gigapascal range
| Project/Area Number |
20K15022
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26020:Inorganic materials and properties-related
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| Research Institution | Nagoya University |
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Principal Investigator |
Sasaki Takuya 名古屋大学, 工学研究科, 助教 (70815787)
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| Project Period (FY) |
2020-04-01 – 2022-03-31
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| Keywords | 高圧合成 / 窒化物 / 蛍光体 |
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| Outline of Final Research Achievements |
In this study, we focused on the high-pressure synthesis of nitride phosphors in the gigapascal (GPa) range and successfully synthesized a novel Eu2+-activated nitride glass phosphor with a composition of Ca5Si2N6 in the Ca3N2-Si3N4 system. The glass phase Ca5Si2N6:Eu2+ phosphor exhibited broad yellow photoluminescence by excitation of near-ultraviolet irradiation and had different photoluminescence properties from the crystal phase Ca5Si2N6:Eu2+ phosphor. In addition, the nitride glass phosphor was found for the first time in this study compared to the many reported oxide glass phosphors.
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| Free Research Field |
無機材料科学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究を通して，窒化物系蛍光体を高圧合成するための合成指針を構築するに至り，今後の高圧下での物質合成に大いに寄与するといえる．また，報告例の僅少な窒化物アモルファス相の合成に成功し，Ca3N2-Si3N4系においては初めて報告例である．また，窒化物アモルファス相（ガラス）が酸化物ガラス蛍光体と同様に蛍光体の母体材料となりうることを見出し，蛍光体母体材料の候補領域として今後より一層発展すると期待される．
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