Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Yi, Xiaoyan"'
Autor:
Lu Pengzhi, Wang Junxi, Xue Bin, Li Jing, Yi Xiaoyan, Xie Haizhong, Li Jinmin, Yang Hua, Wang Guohong
Publikováno v:
SPIE Proceedings.
In this paper, an array of blue LEDs with high optical power was presented and discussed. Optical of the novel design was completed with the help of running simulation in TracePro to predict the performance of the module. 36 Cree XP-E blue LEDs with
Autor:
Liu Lili, Xie Haizhong, Kong Qingfeng, Pei Yanrong, Lu Pengzhi, Yu Fei, Li Jing, Yi Xiaoyan, Wang Xiaotong, Li Jinmin, Xue Bin, Yang Hua, Wang Junxi
Publikováno v:
SPIE Proceedings.
Thanks to the development in epitaxial growth, chip fabrication and packaging of LEDs, emission spectral of the device is capable of covering the visible spectrum. Therefore, Light-emitting diode (LED) is currently undergoing a growing interest in ma
Light Extraction Efficiency Improvement by Curved GaN Sidewalls in InGaN-Based Light-Emitting Diodes
Publikováno v:
IEEE Photonics Technology Letters. 24:243-245
Polygonal GaN sidewalls are fabricated using a laser scriber and a wet-etching process. After a two-step laser scribing process and a hot acid etching treatment, curved GaN sidewalls are formed consisting of the chemically stable (10-1-2) crystallogr
Publikováno v:
Journal of Semiconductors. 37:061001
Due to their low power consumption, long lifetime and high efficiency, nitrides based white light-emitting-diodes (LEDs) have long been considered to be a promising technology for next generation illumination. In this work, we provide a brief review
Autor:
Jingmei Fan, Libin Wang, Zhiqiang Liu, Fuhua Yang, Jinmin Li, Yiping Zeng, Liangchen Wang, Hua Yang, Yu Chen, Guohong Wang, Yi Xiaoyan
Publikováno v:
SPIE Proceedings.
We investigate the relation between the thickness of sapphire substrates and the extraction efficiency of LED. The increasing about 5% was observed in the simulations and experiments when the sapphire thickness changed from 100um to 200um. But the ou
Publikováno v:
SPIE Proceedings.
The structure of micro-LEDs was optimized designed. Optical, electrical and thermal characteristics of micro-LEDs were improved. The optimized design make micro-LEDs suitable for high-power device. The light extraction efficiency of micro-LEDs was an
Autor:
Debo Guo, Jinmin Li, Guohang Wang, Liangchen Wang, Yu Chen, Yi Xiaoyan, Libin Wang, Zhiqiang Liu
Publikováno v:
SPIE Proceedings.
Compared with conventional GaN based LEDs structure, vertical electrodes structure can improve the current uniformity to some extend. However, due to the presence of N-GaN series resistance, current crowing phenomenon still exist at the electrode edg
Autor:
Yi Xiaoyan, Xiaodong Wang, Fuhua Yang, Yan Li, Hua Yang, Liangchen Wang, Guohong Wang, Jinmin Li
Publikováno v:
SPIE Proceedings.
Different types of dielectric optical coatings for GaN based high bright LEDs were designed and discussed. The optical coatings included the anti-reflection (AR) coating, high-reflection (HR) coating, and omni-directional high reflection coating. Mai
Autor:
Liangchen Wang, Xiaodong Wang, Yan Li, Fuhua Yang, Hua Yang, Yi Xiaoyan, Libin Wang, Guohong Wang, Jingmei Fan
Publikováno v:
SPIE Proceedings.
In this paper we studied the influence of N electrode on the extraction efficiency of high power light-emitting diodes (LEDs). Simulation and experimental results show that comparing with traditional metal N electrodes the extraction efficiency of LE
Enhancement of blue InGaN light-emitting diodes by using AlGaN increased composition-graded barriers
Publikováno v:
Journal of Semiconductors. 36:054006
The characteristics of nitride-based blue light-emitting diodes (LEDs) with AlGaN composition-graded barriers are analyzed numerically. The carrier concentrations in the quantum wells (QWs), the energy band diagrams, the electrostatic fields, and the