The effect of trimethylgallium flows in the AIInGaN barrier on optoelectronic characteristics of near ultraviolet light-emitting diodes grown by atmospheric pressure metalorganic vapor phase epitaxy

被引:28
作者
Fu, Yi-Keng [1 ]
Jiang, Ren-Hao [1 ,2 ]
Lu, Yu-Hsuan [1 ,3 ]
Chen, Bo-Chun [1 ]
Xuan, Rong [1 ,4 ]
Fang, Yen-Hsiang [1 ]
Lin, Chia-Feng [2 ]
Su, Yan-Kuin [3 ]
Chen, Jenn-Fang [4 ]
机构
[1] Ind Technol Res Inst, Elect & Optoelect Res Labs, Hsinchu 31040, Taiwan
[2] Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 40227, Taiwan
[3] Natl Cheng Kung Univ, Inst Microelect, Dept Elect Engn, Tainan 70101, Taiwan
[4] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan
关键词
QUANTUM-WELLS;
D O I
10.1063/1.3571440
中图分类号
O59 [应用物理学];
学科分类号
摘要
The letter reports a theoretical and experimental study on the device performance of near ultraviolet light-emitting diodes (LEDs) with quaternary AlInGaN quantum barrier (QB). The indium mole fraction of AlInGaN QB could be enhanced as we increased the trimethylgallium flow rate. It was found the AlInGaN/InGaN LEDs can reduce forward voltage and improve light output power, compared with conventional GaN QB. By using advanced device simulation, it should be attributed to a reduction in lattice mismatch induced polarization mismatch in the active layer, which results in the suppression of electron overflow. (C) 2011 American Institute of Physics. [doi:10.1063/1.3571440]
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页数:3
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