Effect of spontaneous and piezoelectric polarization on optical characteristics of ultraviolet AlGaInN light-emitting diodes

被引：11

作者：

Tsai, Miao-Chan ^{[2
]}

Yen, Sheng-Horng ^{[1
]}

Chang, Shu-Hsuan ^{[3
]}

Kuo, Yen-Kuang ^{[1
]}

机构：

[1] Natl Changhua Univ Educ, Dept Phys, Changhua 500, Taiwan

[2] Natl Changhua Univ Educ, Inst Photon, Changhua 500, Taiwan

[3] Natl Changhua Univ Educ, Dept Ind Educ & Technol, Changhua 500, Taiwan

来源：

OPTICS COMMUNICATIONS | 2009年 / 282卷 / 08期

关键词：

Light-emitting diode; LED; Piezoelectric effect; Numerical simulation; BAND; EFFICIENCY; FIELDS;

D O I：

10.1016/j.optcom.2009.01.014

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Polarization is a crucial issue for electrical and optical characteristics of the UV AlGaInN light-emitting diodes. The effect of spontaneous and piezoelectric polarization on optical characteristics of the UV AlGaInN light-emitting diodes is investigated numerically. The simulation results indicate that the polarization-related effect for the UV AlGaInN light-emitting diodes is dominated by the piezoelectric polarization. When the UV AlGaInN light-emitting diodes are without piezoelectric polarization, the optical performance is enhanced effectively due to improved overlap of electron and hole wavefunctions, reduced electron leakage current, and increased density of holes in the active region. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1589 / 1592

页数：4

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