| Project/Area Number |
25630120
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Gunma University |
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Principal Investigator |
ADACHI Sadao 群馬大学, 大学院理工学府, 教授 (10202631)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Toshihiro 群馬大学, 大学院理工学府, 助教 (90451715)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 蛍光体 / 白色LED / 電子・電気材料 / 光物性 / フォトルミネッセンス / 励起スペクトル / 発光スペクトル / 発光励起スペクトル / 賦活イオン / フッ化物結晶 / アルカリハライド結晶 / ナノワイヤー |
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| Outline of Final Research Achievements |
We have studied structural and optical properties of self-element activated phosphors, such as Tb3Ga5O12:Eu3+ and K2MnF6. To make clear their unique phosphor properties, a comparative study has been performed with the conventional codoped phosphors, such as NaCl:Ce3+, Eu3+ and Ga2O3:Ce3+, Eu3+. An efficient energy transfer has been observed in Tb3Ga5O12:Eu3+ from the host Tb3+ ions to Eu3+, resulting in an enhanced Eu3+ red emission. Systematic studies of phosphor properties have also been carried out on I-IV-F6:Mn4+ hydrate and unhydrate phosphors, CaTiO3:Eu3+, SnO2:Mn2+, SnO2:Eu3+, and porous Si nanocrystals.
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