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Title: Effect of Spontaneous and Piezoelectric Polarization on Optical Characteristics of Ultraviolet AlGaInN Light-emitting Diodes
Authors: Tsai, Miao-Chan;Yen, Sheng-Horng;Chang, Shu-Hsuan;Kuo, Yen-Kuang
Contributors: 物理學系
Keywords: Light-emitting diode;LED;Piezoelectric effect;Numerical simulation
Date: 2009-04
Issue Date: 2012-07-19T01:48:27Z
Publisher: Elsevier
Abstract: 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.
Relation: Optics Communications, 282(8): 1589-1592
Appears in Collections:[Department of Physics] Periodical Articles

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