Resonant cavity effect optimization of III-nitride thin-film flip-chip light-emitting diodes with microsphere arrays

被引：25

作者：

Zhu, Peifen ^{[1
,2
]}

Tansu, Nelson ^{[1
]}

机构：

[1] Lehigh Univ, Dept Elect & Comp Engn, Ctr Photon & Nanoelect, Bethlehem, PA 18015 USA

[2] Univ Tulsa, Dept Phys & Engn Phys, Tulsa, OK 74104 USA

来源：

APPLIED OPTICS | 2015年 / 54卷 / 20期

基金：

美国国家科学基金会;

关键词：

EXTRACTION EFFICIENCY; SPONTANEOUS-EMISSION; DEPOSITION; PERFORMANCE; FABRICATION; IMPACT;

D O I：

10.1364/AO.54.006305

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Comprehensive studies were carried out to investigate the light extraction efficiency of thin-film flip-chip (TFFC) light-emitting diodes (LEDs) with anatase TiO2 microsphere arrays by employing the finite-difference time-domain method. The quantum well position and the resonant cavity effect were studied to obtain optimum light extraction for the planar TFFC LED. Further enhancement in light extraction was achieved by depositing microsphere arrays on the TFFC LED. The calculation results showed that the sphere diameter, packing density, and packing configuration have significant effects on the light extraction efficiency. A maximum light extraction efficiency of 75% in TFFC LEDs with microsphere arrays has been achieved. This study demonstrates the importance of optimizing the quantum well position, cavity thickness, sphere diameter, sphere packing density, and packing configuration for enhancing the light extraction efficiency of TFFC LEDs with microsphere arrays. (C) 2015 Optical Society of America

引用

页码：6305 / 6312

页数：8

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