Nitride-Based LEDs With a Hybrid Al Mirror +TiO2/SiO2 DBR Backside Reflector

作者：Chang S J^*; Shen C F; Hsieh M H; Kuo C T; Ko T K; Chen W S; Shei S C

来源：Journal of Lightwave Technology, 2008, 26(17-20): 3131-3136.

DOI：10.1109/JLT.2008.923927

• Al
• distributed Bragg reflector (DBR)
• GaN
• light-emitting diode (LED)
• reflector

Nitride-based light-emitting diodes (LEDs) with a hybrid backside reflector combining a TiO2/SiO2 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 TiO2/SiO2 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.

• 出版日期2008-10