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Enhancement in light output power of LEDs with reflective current blocking layer and backside hybrid reflector 被引量:1

Enhancement in light output power of LEDs with reflective current blocking layer and backside hybrid reflector
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摘要 A GaN-based light-emitting diode (LED) with reflective current blocking layer (CBL) underneath p-electrode pad and backside hybrid reflector was fabricated and investigated. With a 20 mA injection current, the LED with SiO2 /ITO/Al reflective CBL deposited on naturally textured p-InGaN/p-GaN surface exhibited a light output power that was 7.6% and 18.5% higher than those of the textured LEDs with SiO2 CBL and without SiO2 CBL, respectively. The LED with backside hybrid reflector exhibited a light output power that was 30% higher than that of LED without the hybrid reflector. The enhancement in light output power is attributed to the improved current spreading performance via the SiO2 CBL, the Al omnidirectional metal reflector to prevent the light absorption by the opaque p-electrode pad, and the backside hybrid reflector to extract bottom-emitting light.
出处 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第6期1544-1549,共6页 中国科学(技术科学英文版)
基金 supported by the Postdoctoral Science Foundation of Shanghai (Grant No. 12R21413900) the National Basic Research Project of China ("973" Project) (Grant No. 2011CB013103)
关键词 LEDS reflective CBL hybrid reflector 光输出功率 反射电流 LED 混合型 阻挡层 背面 二氧化硅 SiO2
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