標題: Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs
作者: Chiang, Yen-Chih
Lin, Bing-Cheng
Chen, Kuo-Ju
Chiu, Sheng-Huan
Lin, Chien-Chung
Lee, Po-Tsung
Shih, Min-Hsiung
Kuo, Hao-Chung
光電系統研究所
照明與能源光電研究所
光電工程學系
Institute of Photonic System
Institute of Lighting and Energy Photonics
Department of Photonics
公開日期: 1-Jan-2014
摘要: The GaN-based high-voltage flip chip light-emitting diode (HVFC-LED) is designed and developed for the purpose of efficiency enhancement. In our design, the distributed Bragg reflector (DBR) is deposited at the bonded substrate to increase the light extraction. After the flip chip process, the general current-voltage characteristics between the flip chip sample and the traditional sample are essentially the same. With the help of great thermal conductive silicon substrate and the bottom DBR, the HVFC-LED is able to enhance the power by 37.1% when compared to the traditional high-voltage LEDs. The wall-plug efficiencies of the HVFC-LED also show good droop reduction as high as 9.9% compared to the traditional devices.
URI: http://dx.doi.org/10.1155/2014/385257
http://hdl.handle.net/11536/147733
ISSN: 1110-662X
DOI: 10.1155/2014/385257
期刊: INTERNATIONAL JOURNAL OF PHOTOENERGY
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