2007 Fiscal Year Final Research Report Summary
Development of group-III- nitride-based nanostruchue-embedded phosphor particles
| Project/Area Number |
17360138
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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 |
Electronic materials/Electric materials
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| Research Institution | Shizuoka University |
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Principal Investigator |
HARA Kazuhiko Shizuoka University, Research Institute of Electronics, Professor (80202266)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Gallium nitride / Aluminum nitride / Fine crystalline particle / Hetero-structure / Vapor phase synthesis / Photoluminescence / Cathodoluminescence |
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| Research Abstract |
In contrast to the conventional powder phosphors consisting of particles with a uniform material composition, GaN-based nanostructure-embedded particles, which consist of GaN quantum dots or quantum wells in the AlN matrix, has been proposed to have higher luminescence efficiencies owing to the carrier confinement effect. As a fundamental technique to fabricate such particles, the following three processes have been demonstrated by using the vapor phase method.
(1) The AlN particles were first formed by a reaction of vaporized Al and N_2 gas at temperatures (T_1) from 1100 to 1250℃ in the first reactor. Although the sample prepared at 1100℃ is a mixture of AlN particles and unreacted Al, those prepared at T_1 higher than 1150℃ are a single phase AlN. It was found that the reaction temperature of 1200℃ is favorable from a viewpoint of producing the high quality AlN particles.
(2) At the second step, GaN was grown on the AlN core particles by a reaction of GaCl and NH_3 at 1000℃ in the second reactor. It can be seen that the particle diameter was increased from 0.1-0.2 μm for the AlN core. Thus fabricated GaN/AlN bilayer particles showed cathodoluminescence dominated by the band edge emission of GaN, indicating a high crystalline quality of the overgrown GaN.
(3) AlN was deposited on the surface of GaN particles by a reaction of AlCl_3 and NH_3 in the downstream part of the second reactor. AlN-coated particle showed photoluminescence (PL) dominated by the band edge emission of GaN. The dependence of AlCl_3 supply rate on the PL property suggests the effects of surface barrier to the excited carriers and passivation to surface defects.
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Research Products
(87 results)
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[Presentation] 二段階気相法を応用したGaN系積層構造蛍光体粒子の作製2008
Author(s)
原 和彦, 森 達宏, 菰田浩寛, 小南裕子, 中西洋一郎
Organizer
第55回応用物理学関係連合講演会シンポジウム「新奇プロセスが拓く多元系材料の高機能化の新展開-プロセスに潜むサイエンス-」
Place of Presentation
日本大学理工学部、船橋市
Year and Date
2008-03-27
Description
「研究成果報告書概要(和文)」より
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[Presentation] GaN系多層構造粒子の作製2007
Author(s)
大木佑哉, 森達広, 菰田浩寛, 小南裕子, 中西洋一郎, 原和彦
Organizer
2007年発光・非発光型ディスプレイ合同研究会
Place of Presentation
鳥取大学、鳥取市
Year and Date
2007-01-25
Description
「研究成果報告書概要(和文)」より
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[Presentation] AIN微結晶粒子の気相合成2006
Author(s)
森 達宏, 岡本直也, 大木佑哉, 小南裕子, 中西洋一郎, 原 和彦, 森 連太郎, 稲岡宏弥
Organizer
第53回応用物理学関係連合講演会
Place of Presentation
武蔵工業大学、東京
Year and Date
2006-03-23
Description
「研究成果報告書概要(和文)」より
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[Presentation] 気相法によるAlN核粒子上へのGaN層の形成2006
Author(s)
岡本直也, 大木佑哉, 森 達宏, 小南裕子, 中西洋一郎, 原 和彦, 森 連太郎, 稲岡宏弥
Organizer
第53回応用物理学関係連合講演会
Place of Presentation
武蔵工業大学、東京
Year and Date
2006-03-23
Description
「研究成果報告書概要(和文)」より
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