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高亮度发光二极管外量子效率的计算 被引量:2

Calculating External Quantum Efficiency of High Bright Light Emitting Diodes
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摘要 本文对典型结构高亮度发光二极管(HB-LED)的注入电流扩展以及器件的光输出进行了详细的理论分析,结果表明具有较厚顶层的器件容易实现注入电流的扩展,而具有较厚的底层即具有透明衬底的器件容易实现光耦合输出,因此引入较厚顶层和底层是提高LED的外量子效率的有效手段.最后分别计算出不同顶层厚度下具有吸收衬底和透明衬底的LED的外量子效率,这两类LED 最大外量子效率分别为 12.05%和20.12%. By analyzing HB-LED model about electrical inject, optical output and calculating the distributing of electrical density photon output coupling efficiency at different top layer in HB-LED, we found the thicker of top layer and bottom layer, the easier for electrical spread and optical output. The calculating result showed that the thickness of top layer and bottom layer should be 49-98μm and 148μm, respectively The maximal external quantum efficiency of these types of LED is 12.05% and 20.12%.
出处 《量子电子学报》 CAS CSCD 北大核心 2002年第1期65-69,共5页 Chinese Journal of Quantum Electronics
基金 2000年国家科技攻关项目 编号为:00-068 广州市科技重点攻关项目 编号为:1999-Z-035-01
关键词 外量子效率 电流密度分布 亮度 发光二极管 HB-LED internal quantum efficiency external quantum efficiency current density distribution
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同被引文献15

  • 1潘华璞,黄利伟,李睿,林亮,陈志忠,张国义,胡晓东.GaN基LED电流扩展的有限元模型及电极结构优化[J].发光学报,2007,28(1):114-120. 被引量:8
  • 2Klaus Streubel, Norbert Linder, Ralph, et al. High brightness AlGaInP light-emitting diodes [ J ]. Quantum Electronics, 2002,8 (2) : 321-331.
  • 3Kim Jong Kyu, Xi J Q, Schubert E Fred. Omnidirectional reflectors for light-emitting diodes [J]. Proceedings of SPIE, 6134 (61340D) : 1-12.
  • 4Chou C H, Lin C L, Chuang Y C. High thermally stable Ni/Ag (Al) alloy contacts on p-GaN[J]. Applied Physics Letters, 2007,90(022103): 1-3.
  • 5Huh C,Lee J,Kim D,et al.Improvement in light-output efficiency of InGaN/GaN multiple-quantum well light-emittingdiodes by current blocking layerJournal of Applied Physiology,2002.
  • 6Jeong H H,Lee S Y,Jeong Y K,et al.Improvement of the light output power of GaN-based vertical light emitting diodes by a current blocking layerElectrochemical and Solid State Letters,2010.
  • 7Linder N,Kugler S,Stauss P,et al.High-brightness AlGaInP light-emitting diodes using surface texturingProceedings of SPIE the International Society for Optical Engineering,2001.
  • 8Wang H C,Su Y K,Lin C L,et al.InGaN/GaN light emitting diodes with a lateral current blocking structureJapanese Journal of Applied Physics,2004.
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