Nitride-based LEDs with a hybrid Al mirror +TiO 2/ SiO 2 DBR backside reflector

S. J. Chang, C. F. Shen, M. H. Hsieh, C. T. Kuo, T. K. Ko, W. S. Chen, S. C. Shei

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Nitride-based light-emitting diodes (LEDs) with a hybrid backside reflector combining a TiO 2/SiO 2 distributed Bragg reflector (DBR) and an Al mirror were proposed and realized. It was found that we can significantly enhance the 35% reflectivity of the 2-pair TiO 2/SiO 2 DBR to 94% by combining with Al mirror (hybrid reflector). Furthermore, reflectivity of the proposed reflector depends only slightly on incident light wavelength and the incident angle. With 350-mA current injection, it was found that the output powers were 145.7, 178.2, and 201.9 mW for the LEDs with 2-pair DBR, with an Al mirror and with a hybrid reflector, respectively, when packaged in TO-cups. It was also found that reliability for the LED with the hybrid reflector is good.

Original languageEnglish
Pages (from-to)3131-3136
Number of pages6
JournalJournal of Lightwave Technology
Volume26
Issue number17
DOIs
Publication statusPublished - 2008 Sep 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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