材料科学
发光二极管
光电子学
光子晶体
光通量
萃取(化学)
氮化镓
时域有限差分法
图层(电子)
发光效率
光散射
光子学
扩散
散射
功率(物理)
光学
光源
纳米技术
物理
化学
量子力学
热力学
色谱法
出处
期刊:NANO
[World Scientific]
日期:2022-11-01
卷期号:17 (12)
标识
DOI:10.1142/s1793292022500916
摘要
In this paper, we propose a double-layer SiO 2 photonic crystal LED with a linear defect structure in the [Formula: see text]-GaN layer, the purpose is to solve the problem of low light extraction efficiency caused by diffusion scattering effect. We used FDTD modeling to analyze the light-emitting characteristics of GaN LED, after optimizing the structural parameters of two-dimensional photonic crystals, the light extraction efficiency is improved from 19.4% to 35.2%, the light extraction efficiency is increased by 1.8 times, meanwhile the light output power is also increased by 1.86 times. The introduction of the defect structure does not affect the [Formula: see text]–[Formula: see text] characteristics of the LED, and the output power of the LED is increased by 11% under the current of 300[Formula: see text]mA.
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