Development of quantum cutting phosphor materials for efficacy improvement of mercury-free fluorescent lamps
| 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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Report
(4 results)
Research Products
(27 results)
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[Presentation] Photon Cascade Emission of Pr3+in Stronrium Aluminate2010
Author(s)
Y. Ikeda, K. Masada, H. Kurokawa, H. Motomura, M. Jinno, K. Tachibana
Organizer
12th International Symposium on the Science and Technology of Light Sources and the 3rd International Conference on White LEDs and Solid State Lighting, Eindhoven
Place of Presentation
Netherland
Year and Date
2010-07-15
Related Report
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