Nitride-Based LEDs With High-Reflectance and Wide-Angle Ag Mirror+SiO2/TiO2 DBR Backside Reflector

作者：Lin Nan Ming^*; Shei Shih Chang; Chang Shoou Jinn

来源：Journal of Lightwave Technology, 2011, 29(7): 1033-1038.

DOI：10.1109/JLT.2011.2111416

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

Nitride-based light-emitting diodes (LEDs) with a backside reflector combining a SiO2/TiO2 distributed Bragg reflector (DBR) and an Ag mirror were simulated and fabricated. With combining the three-pair SiO2/TiO2 DBR and an Ag mirror, it was found that we can significantly enhance the 96% reflectance of Ag mirror to 99.1% with an incident angle of 0 degrees. Furthermore, reflectance of the proposed reflector depends slightly on incident light wavelength and the incident angle. With 350-mA current injection, it was found that the output powers were 122, 138, 153, 156, and 162 mW for the LEDs without reflector, with an Al mirror, with Al+3DBR mirror, with an Ag mirror, and with Ag+3DBR mirror, respectively.

• 出版日期2011-4-1