| Project/Area Number |
09555187
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
SHIMADA Masahiko Institute for Advanced Materials Processing, Tohoku University Professor, 素材工学研究所, 教授 (80029701)
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| Co-Investigator(Kenkyū-buntansha) |
UHEDA Kyota School of Engineering, Tohoku University, Research Associate, 工学部, 助手 (50271862)
KUBOTA Shun-ichi Institute for Advanced Materials Processing, Tohoku University Research Associate, 素材工学研究所, 助手 (10271975)
TAKIZAWA Hirotsugu School of Engineering, Tohoku University, Associate Professor, 工学部, 助教授 (90226960)
SHIMIZU Etsuo Kasei Optonix, Ltd, Acting General Manager, 研究開発室, 部長代理(研究職)
HASE Takashi Kasei Optonix, Ltd, General Manager, 研究開発室, 部長(研究職)
長谷 尭堯 化成オプトニクス株式会社, 研究開発室, 部長(研究職)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥13,100,000 (Direct Cost: ¥13,100,000)
Fiscal Year 1999: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1998: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1997: ¥10,000,000 (Direct Cost: ¥10,000,000)
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| Keywords | high luminous materials / luminescence properties / layered structure / concentration quenching / energy migration / melilite type structure / emission decay curve / 高輝度蛍光体 / 一次元的エネルギー回遊 |
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| Research Abstract |
The development of high performance display devices requires high luminous materials. The fabrication of new phosphors is examined from the standpoint based on crystal chemistry.
High luminous ceramic materials of EuィイD13+ィエD1,TbィイD13+ィエD1 and TmィイD13+ィエD1-doped polytantalate of LaTaィイD27ィエD2OィイD219ィエD2, gallates and aluminates of SrLaGaィイD23ィエD2OィイD27ィエD2 and CaLaAlィイD23ィエD2OィイD27ィエD2 with layered structures have been developed. It was found that these ceramic materials had high critical concentrations under UV exitation. The energy migration between EuィイD13+ィエD1,TbィイD13+ィエD1 and TmィイD13+ィエD1 ions in these ceramic materials was strongly affected by the crystal structure. We propose the material design of thigh luminous ceramic materials from the view points of the distance between luminescent ions in plane and between layers in the crystal structure.
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