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1
題名:直流電流導致氮化鎵功率發光二極體發光效率衰減之因素     (10點)
A DC-Current-Induced Rollover of the Illumination Efficiency of GaN-Based Power
著者:劉秉承(Bing-Cheng Liu) ;林睿蜻(Ruei-Ching Lin) ;林雲翔(Yun-Hsiang Lin) ;黃文祥(Patrick Huang) ;廖豐標(Michael P. Liao)
出版地區:台灣
出版城市:彰化縣
學科:自科綜合 ; 應科綜合
關鍵字:發光二極體 ; 發光效率 ; 接面溫度 ; 載子濃度 ; light-emitting diode ; illumination efficiency ; junction temperature ; carrier concentration
刊名:科學與工程技術期刊
卷期:4卷3期(2008.9)
頁碼:9-13
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

近年來,高功率發光二極體的應用領域不斷地增加。除了交通號誌及戶外看板外,高功率發光二極體也逐漸在背光模組及固態照明等應用中佔有一席之地。 高功率發光二極體需要大電流驅動,使用時會產生大量的熱,進而影響發光二極體的性能,例如發光效率及可靠度。 這篇論文中,我們使用脈衝電流探討直流電流下,高功率氮化鎵發光二極體發光效率衰減的因素。藉由脈衝驅動,我們可以區分高功率氮化鎵發光二極體中接面溫度和注入載子濃度對發光效率衰減的影響。比較脈衝驅動跟直流驅動的量測結果後,我們證明高功率氮化鎵發光二極體發光率衰減主要是由於發光二極體的接面溫度和注入載子濃度所造成。
In recent years, applications of high-power light-emitting diodes (LEDs) have constantly increased. In addition to traffic signs and outdoor-boards, high-power LEDs have gained ground in applications to back-lighting systems and solid-state illumination. High-power LEDs requiring high-current drives generate much heat, which in turn degrades the performance of devices in areas such as illumination efficiency and reliability. In this research, pulse-driven currents were utilized to investigate DC-current-induced degradation of the illumination efficiency of GaN-powered LEDs. By using pulse-driven currents, the effects of junction temperature and carrier concentration on this type of degradation can be distinguished. By comparing the measurement results obtained from pulse- and DC-driven currents, it was verified that junction temperature and carrier concentration are the major causes of such DC-current-induced degradation.


    

本卷期目次
科學與工程技術期刊 4卷3期 (2008.9)
直流電流導致氮化鎵功率發光二極體發光效率衰減之因素/ 劉秉承林睿蜻林雲翔黃文祥廖豐標
牙科用鑄造Ti-Cr合金之金屬燒付陶瓷鍵結與熱膨脹係數研究/ 何文福姜宗佑許學全吳世經林錫禎
A Tunable Damping and Natural-Frequency-Characteristic Analysis of an Orthotropic Annular Plate/ Jia-Yi YehJiun-Yeu ChenMing-Ying HsuKuan-Chuan Fang
Designing a Two-Dimensional (2-D) Rake Receiver Scheme for an MC-DS-CDMA System/ Joy Iong-Zong ChenChieh-Wen LiouYung-Nan Hu
Applying Correlated-Gamma Statistics in the Evaluation of the Channel Capacity of a Dual-Branch MRC Diversity System/ Joy Iong-Zong ChenWen-Sheng Tu
多孔矽/n-Si結構的光電特性探討/ 黃俊達卓其何
大花咸豐草不同部位之抗氧化性/ 江淑華陳志瑋王秀育賴潔賢張基郁
大花咸豐草不同部位之抗氧化性/ 江淑華陳志瑋王秀育賴潔賢張基郁
多孔矽/n-Si結構的光電特性探討/ 黃俊達卓其何
牙科用鑄造Ti-Cr合金之金屬燒付陶瓷鍵結與熱膨脹係數研究/ 何文福姜宗佑許學全吳世經林錫禎
Designing a Two-Dimensional (2-D) Rake Receiver Scheme for an MC-DS-CDMA System/ Joy Iong-Zong ChenChieh-Wen LiouYung-Nan Hu
A Tunable Damping and Natural-Frequency-Characteristic Analysis of an Orthotropic Annular Plate/ Jia-Yi YehJiun-Yeu ChenMing-Ying HsuKuan-Chuan Fang
Applying Correlated-Gamma Statistics in the Evaluation of the Channel Capacity of a Dual-Branch MRC Diversity System/ Joy Iong-Zong ChenWen-Sheng Tu
植基於S-tree技術的影像壓縮研究/ 陳文儉侯錫坤
Image Compression Based on S-Tree Techniques/ Wen-Jan ChenSi-Kun Hou
直流電流導致氮化鎵功率發光二極體發光效率衰減之因素/ 劉秉承林睿蜻林雲翔黃文祥廖豐標
 
   
 
   

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