Light Extraction Enhancement of Deep Ultraviolet Light-Emitting Diodes by Using Aluminum Reflector Cup
In this paper,we proposed an optimized aluminum(Al)reflector for the light extraction efficiency enhancement of deep UV-LEDs.The optical model of deep UVLEDs was established and the optical simulations were performed to achieve the optimized reflector.The deep UVLEDs yield a highest light efficiency when the reflector has optimized feature sizes,which are an angle of 60°,a height of 2.0 mm,and an internal radius of 2.5 mm.Furthermore,the optimized Al reflector were designed and fabricated and applied to deep UV-LEDs package.Therefore,the optical light output powers of deep UV-LEDs are improved by 25.5%,43.8%,and 39.3%,respectively,by using the optimized reflectors at the different driving current of 50mA,100mA,150mA.This is due to the remarkable deep UV-LEDs optical reflection effect of the Al reflector,which increases the light extraction of the sidewall emission of the deep UV-LED chip.
Light efficiency Aluminum reflector Optimized structure deep ultraviolet light-emitting diodes (Deep UV-LEDs)
Xingxing Liu Yun Mou Yang Peng Mingxiang Chen Hao Wang Renli Liang
School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan,Chi National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan,China
国际会议
上海
英文
1426-1428
2018-08-08（万方平台首次上网日期，不代表论文的发表时间）