Efficiency improvement of AlGaN-based deep ultraviolet LEDs with gradual Al-composition AlGaN conduction layer

被引：7
|
作者：
Huang, Ping-yang [1 ,2 ]
Xiao, Long-fei [3 ]
Chen, Xiu-fang [3 ]
Wang, Qing-pu [1 ,2 ]
Xu, Ming-sheng [1 ,2 ]
Xu, Xian-gang [3 ]
Huang, Jing [4 ]
机构：
[1] Shandong Univ, Ctr Nanoelect, Jinan 250100, Shandong, Peoples R China
[2] Shandong Univ, Sch Microelect, Jinan 250100, Shandong, Peoples R China
[3] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China
[4] Guizhou Minzu Univ, Sch Mechatron Engn, Guiyang 550025, Guizhou, Peoples R China
来源：
OPTOELECTRONICS LETTERS | 2020年 / 16卷 / 04期
关键词：
LIGHT-EMITTING-DIODES; HOLE INJECTION; UV-LEDS; PERFORMANCE; INACTIVATION; KINETICS; ELECTRON; SYSTEM;
D O I：
10.1007/s11801-020-0072-4
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The low internal quantum efficiency (IQE) of AlGaN-based deep ultraviolet light emitting diode (DUV-LED) limits its wider application. The main reasons for low IQE include low carrier concentration, poor carrier location and large defects. The bending of energy band between AlGaN electron blocking layer and conduction layer obstructs transport of holes to multiple quantum wells. In this paper, we propose a gradual Al-composition p-type AlGaN (p-AlGaN) conduction layer to improve the light emitting properties of AlGaN-based DUV-LED. Increased carrier concentration in the active region enhances the effective radiative recombination rate of the LED. Consequently, the IQE of our optimazited DUV-LED is increased by 162% in comparison with conventional DUV-LEDs.
引用
收藏
页码：279 / 283
页数：5
相关论文
共 50 条
  • [1] Efficiency improvement of AlGaN-based deep ultraviolet LEDs with gradual Al-composition AlGaN conduction layer
    Ping-yang Huang
    Long-fei Xiao
    Xiu-fang Chen
    Qing-pu Wang
    Ming-sheng Xu
    Xian-gang Xu
    Jing Huang
    Optoelectronics Letters, 2020, 16 : 279 - 283
  • [2] Efficiency improvement of AlGaN-based deep ultraviolet LEDs with gradual Al-composition AlGaN conduction layer
    黄平洋
    肖龙飞
    陈秀芳
    王卿璞
    徐明升
    徐现刚
    黄静
    OptoelectronicsLetters, 2020, 16 (04) : 279 - 283
  • [3] Performance improvement of AlGaN-based deep-ultraviolet light-emitting diodes via Al-composition graded quantum wells
    Lu, Lin
    Zhang, Yu
    Xu, Fujun
    Ding, Gege
    Liu, Yuhang
    SUPERLATTICES AND MICROSTRUCTURES, 2018, 118 : 55 - 60
  • [4] The influence of point defects on AlGaN-based deep ultraviolet LEDs
    Ma, Zhanhong
    Almalki, Abdulaziz
    Yang, Xin
    Wu, Xing
    Xi, Xin
    Li, Jing
    Lin, Shan
    Li, Xiaodong
    Alotaibi, Saud
    Al Huwayz, Maryam
    Henini, Mohamed
    Zhao, Lixia
    JOURNAL OF ALLOYS AND COMPOUNDS, 2020, 845 (845)
  • [5] AlGaN-based deep ultraviolet LEDs: Materials challenges and device performance
    Crawford, MH
    Allerman, AA
    Fischer, AJ
    Bogart, KHA
    Lee, SR
    Chow, WW
    2005 PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, 2005, : 204 - 205
  • [6] Advances in AlGaN-based deep UV LEDs
    Crawford, MH
    Allerman, AA
    Fischer, AJ
    Bogart, KHA
    Lee, SR
    Chow, WW
    Wieczorek, S
    Kaplar, RJ
    Kurtz, SR
    GaN, AIN, InN and Their Alloys, 2005, 831 : 545 - 556
  • [7] AlGaN-based Deep Ultraviolet LEDs by Plasma assisted Molecular Beam Epitaxy
    Kao, Chen-Kai
    Liao, Yitao
    Thomidis, Christos
    Moldawer, Adam
    Bhattarai, Dipesh
    Sun, Haiding
    Moustakas, Theodore D.
    2011 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), 2011,
  • [8] Planar Compound Eye Lens for Enhanced Light Extraction Efficiency in AlGaN-Based Deep Ultraviolet LEDs
    Tan, Qilong
    Zhao, Jie
    Li, Qixin
    Liu, Huan
    Dong, Bin
    He, Chenguang
    Chen, Zhitao
    Zhou, Wen
    Liu, Ningyang
    ADVANCED PHOTONICS RESEARCH, 2024, 5 (03):
  • [9] Suppressing the efficiency droop in AlGaN-based UVB LEDs
    Usman, Muhammad
    Malik, Shahzeb
    Khan, M. Ajmal
    Hirayama, Hideki
    NANOTECHNOLOGY, 2021, 32 (21)
  • [10] Improvement of AlGaN-based deep ultraviolet light-emitting diodes by using a graded AlGaN superlattice hole reservoir layer
    Wang, Xin
    Sun, Hui-Qing
    Guo, Zhi-You
    OPTICAL MATERIALS, 2018, 86 : 133 - 137
12345