Improvement of Output Power of AlGaN-Based Ultraviolet Light Emitting Diodes with Sawtooth Barriers

被引：9
|
作者：
Wang, Dunnian [1 ]
Yin, Yian [1 ]
Chen, Ximeng [1 ]
机构：
[1] South China Normal Univ, Inst Optoelect Mat & Technol, Guangzhou 510000, Guangdong, Peoples R China
来源：
JOURNAL OF ELECTRONIC MATERIALS | 2019年 / 48卷 / 07期
关键词：
UV-LEDs; AlGaN; sawtooth; multi-layer barrier; MACROSCOPIC POLARIZATION; EFFICIENCY; ENHANCEMENT; LEDS;
D O I：
10.1007/s11664-019-07200-y
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A special structure with Al-composition graded barriers in the active region was designed to provide a sawtooth layer for the multiple quantum barriers, which were investigated numerically. The simulation demonstrates that the output power of optimized structure has reached to 50mW and the efficiency droop also has significantly improved. By detailedly analyzing the results, the advantages of the ultraviolet light emitting diodes with sawtooth barriers are attributed to the design, which could enhance the ability of electrons reservoir, modulate carrier distribution and suppress electron spill out from the active region. As a result, it can enhance the rate of carrier radiation recombination and ameliorate internal quantum efficiency.
引用
收藏
页码：4330 / 4334
页数：5
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