標題: Advantages of Blue LEDs With Graded-Composition AlGaN/GaN Superlattice EBL
作者: Lin, Bing-Cheng
Chen, Kuo-Ju
Han, Hau-Vei
Lan, Yu-Pin
Chiu, Ching-Hsueh
Lin, Chien-Chung
Shih, Min-Hsiung
Lee, Po-Tsung
Kuo, Hao-Chung
光電工程學系
Department of Photonics
關鍵字: Light-emitting diodes (LEDs);quantum well (QWs);superlattice (SL)
公開日期: 1-Nov-2013
摘要: InGaN/GaN light-emitting diodes (LEDs) with graded-composition AlGaN/GaN superlattice (SL) electron blocking layer (EBL) were designed and grown by metal-organic chemical vapor deposition. The simulation results demonstrated that the LED with a graded-composition AlGaN/GaN SL EBL have superior hole injection efficiency and lower electron leakage over the LED with a conventional AlGaN EBL or normal AlGaN/GaN SL EBL. Therefore, the efficiency droop can be alleviated to be similar to 20% from maximum at an injection current of 15-120 mA, which is smaller than that for conventional AlGaN EBL (30%). The corresponding experimental results also confirm that the use of a graded-composition AlGaN/GaN SL EBL can markedly enhance the light output power by 60%.
URI: http://dx.doi.org/10.1109/LPT.2013.2281068
http://hdl.handle.net/11536/22961
ISSN: 1041-1135
DOI: 10.1109/LPT.2013.2281068
期刊: IEEE PHOTONICS TECHNOLOGY LETTERS
Volume: 25
Issue: 21
起始頁: 2062
結束頁: 2065
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