1 College of Physical Science and Technology, Yangzhou University, Yangzhou 225002, China;
2 Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China;
3 Sino-Semiconductors Technologies Co., Ltd., Taizhou 225300, China;
4 Jiangsu Kinzo Opto-electronic Instrument Co., Ltd., Yangzhou 225100, China;
5 School of Mathematical and Physical Sciences, University of Technology Sydney, 15 Broadway, Ultimo NSW 2007, Australia
In this study, an InGaN lighting-emitting diode (LED) containing GaN/AlGaN/GaN triangular barriers is proposed and investigated numerically. The simulation results of output performance, carrier concentration, and radiative recombination rate indicate that the proposed LED has a higher output power and an internal quantum efficiency, and a lower efficiency droop than the LED containing conventional GaN or AlGaN barriers. These improvements mainly arise from the modified energy bands, which is evidenced by analyzing the LED energy band diagram and electrostatic field near the active region. The modified energy bands effectively improve carrier injection and confinement, which significantly reduces electron leakage and increases the rate of radiative recombination in the quantum wells.
(Quantum well devices (quantum dots, quantum wires, etc.))
Fund:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFB0403100 and 2017YFB0403101), the National Natural Science Foundation of China (Grant Nos. 61404114, 61504119, and 11004170), the China Postdoctoral Science Foundation (Grant No. 2017M611923), and the Jiangsu Planned Projects for Postdoctoral Research Funds, China (Grant No. 1701067B).
Krames M R, Shchekin O B, Mueller-Mach R, Mueller G O, Zhou L, Harbers G and Craford M G 2007 J. Disp. Technol. 3 160
[2]
Dhanabalan S C, Ponraj J S, Guo Z, Li S, Bao Q and Zhang H 2017 Adv. Sci. 4 1600305
[3]
Ponraj J S, Xu Z Q , Dhanabalan S C, Mu H, Wang Y, Yuan J, Li P, Thakur S, Ashrafi M, Mccoubrey K, Zhang Y, Li S, Zhang H and Bao Q 2016 Nanotechnology 27 462001
[4]
Dhanabalan S C, Ponraj J S, Zhang H and Bao Q 2016 Nanoscale 8 6410
[5]
Piprek J 2010 Phys. Status Solidi A 207 2217
[6]
Ivel, J, Martinelli L, Peretti J, Speck J S and Weisbuch C 2013 Phys. Rev. Lett. 110 177406
[7]
Xu J, Schubert M F, Noemaun A N, Zhu D, Kim J K, Schubert E F, Park Y, et al. 2009 Appl. Phys. Lett. 94 011113
[8]
Zhao H, Liu G, Zhang J, Arif R A and Tansu N 2013 J. Disp. Technol. 9 212
[9]
Kuo Y K, Horng S H, Tsai, M C, Yen S H and Chang S H 2010 Opt. Commun. 283 3698
[10]
Kim M H, Schubert M F, Dai Q, Kim J K, Schubert E F, Piprek J and Park Y 2007 Appl. Phys. Lett. 91 183507
[11]
Xie J, Ni X, Fan Q, Shimada R, Özgür Ü and Morkoç H 2008 Appl. Phys. Lett. 93 121107
[12]
Ni X, Fan Q, Shimada R, Özgür Ü and Morkoç H 2008 Appl. Phys. Lett. 93 171113
[13]
Wang C H, Chang S P, Chang W T, Li J C, Lu Y S, Li Z Y and Wang S C 2010 Appl. Phys. Lett. 97 181101
[14]
Chang J Y, Tsai M C and Kuo Y K 2010 Opt. Lett. 35 1368
[15]
Kim K S, Kim J H, Jung S J, Park Y J and Cho S N 2010 Appl. Phys. Lett. 96 091104
[16]
Zhang Y Y and Yin A Y 2011 Appl. Phys. Lett. 99 221103
[17]
Gong C C, Fan G H, Zhang Y Y, Xu Y Q, Liu X P, Zheng S W, Yao G R and Zhou D T 2012 Chin. Phys. B 21 068505
[18]
Gorai A, Panda S and Biswas D 2017 Optik 140 665
[19]
Kuo Y K, Chang J Y, Tsai M C and Yen S H 2009 Appl. Phys. Lett. 95 011116
[20]
APSYS by Crosslight Software Inc Burnaby Canada (http://www.crosslight.com)
[21]
Cheng L, Wu S, Xia C and Chen H 2015 J. Appl. Phys. 118 103103
[22]
Cheng L and Wu S 2014 IEEE J. Quantum Electron. 50 261
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.