Improving the Extraction Efficiency of Planar GaN-Based Blue Light-Emitting Diodes via Optimizing Indium Tin Oxide Nanodisc Arrays

Q Engineering

Journal of Display Technology Pub Date : 2016-10-26 DOI:10.1109/JDT.2016.2621138

Zhanxu Chen;Wenjie Liu;Wei Wan;Gengyan Chen;Baijun Zhang;Chongjun Jin

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引用次数: 7

Abstract

We report an enhancement in light emission of a GaN-based blue light-emitting diode (LED) with periodic indium tin oxide (ITO) nanodisc arrays. The periodic nanodisc arrays were elaborately designed by the Bragg diffraction and the maximum transmittance of a model of bilayer film on a GaN epitaxial layer. In the experiment, the periodic ITO nanodisc arrays have been fabricated by polystyrene nanosphere lithography. The electroluminescence intensity of the LEDs with periodic ITO nanodisc arrays is better than that of conventional planar GaN-based LED, and the greatest enhancement could increase the intensity by a factor of 2.08 at an operating current of 20 mA compared with the conventional planar GaN-based LED. The simulation results based on three-dimensional finite difference time-domain method showed that the LED with periodic ITO nanodisc arrays can improve the light-extraction efficiency of LED by enhancing the critical angle of light output. This method would be valuable for the fabrication of high-efficiency planar GaN-based LEDs.

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优化氧化铟锡纳米盘阵列提高平面GaN基蓝光发射二极管的提取效率

我们报道了具有周期性铟锡氧化物（ITO）纳米盘阵列的GaN基蓝色发光二极管（LED）的发光增强。利用GaN外延层上双层膜模型的布拉格衍射和最大透射率，精心设计了周期性纳米盘阵列。实验中，采用聚苯乙烯纳米球光刻技术制备了周期性ITO纳米盘阵列。具有周期性ITO纳米盘阵列的LED的电致发光强度优于传统的平面GaN基LED，并且与传统的平面氮化镓基LED相比，在20mA的工作电流下，最大的增强可以将强度提高2.08倍。基于三维时域有限差分方法的仿真结果表明，周期性ITO纳米盘阵列的LED可以通过提高光输出的临界角来提高LED的光提取效率。该方法对于制造高效平面GaN基LED是有价值的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Display Technology 工程技术-工程：电子与电气

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

2.8 months

期刊介绍： This publication covers the theory, material, design, fabrication, manufacturing and application of information displays and aspects of display technology that emphasize the progress in device engineering, design and simulation, materials, electronics, physics, and reliability aspects of displays and the application of displays. The Journal is sponsored by EDS, seven other IEEE societies (BT, CES, CPMT, IA, IM, PHO and SSC) and the Optical Society of America (OSA).