Comprehensive multi-level spectroscopy of below-gap states without electrode
| Project/Area Number |
24360005
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Saitama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
FUKUDA Takeshi 埼玉大学, 理工学研究科, 助教 (40509121)
HIRAYAMA Hideki 理研, 平山量子光素子研究室, 主任研究員 (70270593)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
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| Keywords | フォトルミネッセンス / 半導体 / 非発光再結合準位 |
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| Outline of Final Research Achievements |
Nonradiative recombination (NRR) centers and trap centers which result in efficiency reduction and shortening of operating lifetime were detected based on the method of two-wavelength excited photoluminescence (TWEPL) by improving below-gap excitation (BGE) light sources. We attained first optical detection of NRR centers in AlGaN-MQWs, InAlGaN-MQWs for deep-UV LEDs and derived a set of NRR parameters. Trap centers and NRR centers in Ba3Si6O12N2:Eu2+ (BSON) phosphor were detected by thermo-luminescence and the TWEPL for the first time. The former cause transient component of the BGE effect, while the latter cause the steady state component.
In summary, a comprehensive detection and analysis of defect states in light emitting materials has been attained based on an improved TWEPL method.
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Report
(4 results)
Research Products
(39 results)
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[Book] 新編「照明専門講座テキスト」2014
Author(s)
鎌田憲彦,池田紘一, 稲森真, 入倉隆, 上谷芳昭, 鵜川浩一, 宇山徹, 垣谷勉,河合悟, 木下忍, 坂本政佑, 佐藤孝, 神野雅文, 田淵義彦, 長篤志, 土井正, 橋本和明, 八田章光, 松島公嗣, 村上克介（分担執筆）
Publisher
一般社団法人照明学会
Related Report
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[Book] 「光ｴﾚｸﾄﾛﾆｸｽ 展開編」2014
Author(s)
多田邦雄, 神谷武志(監訳), 鎌田憲彦, 石川卓也, 板谷太郎, 伊藤文彦, 岡田至崇, 土屋昌弘, 中野義昭, 中林隆志, 林秀樹（共訳）
Publisher
丸善出版株式会社
Related Report
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