標題: Efficiency and Droop Improvement in GaN-Based High-Voltage Light-Emitting Diodes
作者: Wang, C. H.
Lin, D. W.
Lee, C. Y.
Tsai, M. A.
Chen, G. L.
Kuo, H. T.
Hsu, W. H.
Kuo, H. C.
Lu, T. C.
Wang, S. C.
Chi, G. C.
電子物理學系
光電工程學系
Department of Electrophysics
Department of Photonics
關鍵字: Current spreading;efficiency droop;high voltage;light-emitting diodes
公開日期: 1-八月-2011
摘要: The efficiency and electrical characteristics of GaN-based high-voltage light-emitting diodes (HV-LEDs) are investigated in detail. The spatial distribution of light output and simulation results showed that 100-V HV-LED with smaller microchips had superior current spreading. As a result, under 1-W operation, the luminous efficiency of 100-V HV-LED with smaller microchips was enhanced by 7.8% compared to that of 50-V HV-LED, while the efficiency droop behaviors were reduced from 28% in 50-V HV-LED to 25.8% in 100-V HV-LED. Moreover, smaller microchips exhibited lower series resistance and forward voltage, leading to higher wall-plug efficiency.
URI: http://dx.doi.org/10.1109/LED.2011.2153176
http://hdl.handle.net/11536/20871
ISSN: 0741-3106
DOI: 10.1109/LED.2011.2153176
期刊: IEEE ELECTRON DEVICE LETTERS
Volume: 32
Issue: 8
起始頁: 1098
結束頁: 1100
顯示於類別:期刊論文


文件中的檔案:

  1. 000293710400035.pdf