| Project/Area Number |
22360038
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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 | 一般 |
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| Research Field |
Applied physics, general
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| Research Institution | Ehime University |
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Principal Investigator |
JINNO Masafumi 愛媛大学, 大学院・理工学研究科, 教授 (30274335)
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| Co-Investigator(Kenkyū-buntansha) |
MOTOMURA Hideki 愛媛大学, 大学院・理工学研究科, 准教授 (80332831)
UEMURA Akira 愛媛大学, 大学院・理工学研究科, 助教 (40274336)
TACHIBANA Kunihide 愛媛大学, 大学院・理工学研究科, 教授 (40027925)
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| Co-Investigator(Renkei-kenkyūsha) |
GOTOH Hidekazu 大阪大学, 工学研究科, 准教授 (80170463)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2012: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2011: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Keywords | 量子分割蛍光体 / プラセオジム / UV蛍光体 / LED / 無水銀光源 / プラズマ / 高効率光源 / 蛍光体 / 量子分割 / 真空紫外励起 |
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| Research Abstract |
For the purpose of efficacy improvement of mercury-free light sources, the authors focused on quantum cuttingprocess in a special phosphor materials, in which two visible photons were emitted by one-photon excitation. During optimization of the mixtures of raw materials and sintering conditions, it is found that existence of STE (self-trapped excitation) band in the hand structure of sintered quantum cutting phosphor lowers its quantum efficiency. A Xe DBD lamp with the developed phosphor (SrAl12O19:Pr3+) showed high color temperature (7360 K) emission, which showed a possibility of a practical use as a white light emission phosphor. Another host crystal (SrAl2O4) with Pr3+dopant showed UV-C (252 nm) emission, which will be utilized for sterilization or cleaning purpose.
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