Air-ring microstructure arrays for enhanced light extraction from a face-up light-emitting diode

被引：2

作者：

Kim, Hyun Kyu ^{[1
]}

Park, Young Jae ^{[1
]}

Kang, Ji Hye ^{[1
]}

Han, Nam ^{[1
]}

Han, Min ^{[1
]}

Ryu, Beo Deul ^{[1
]}

Ko, Kang Bok ^{[1
]}

Yang, Jong Han ^{[1
]}

Kim, Young Taek ^{[1
]}

Chandramohan, S. ^{[1
]}

Jeong, Hyun ^{[2
]}

Jeong, Mun Seok ^{[2
]}

Hong, Chang-Hee ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Semicond Phys Res Ctr, Sch Semicond & Chem Engn, Jeonju 561756, South Korea

[2] Sungkyunkwan Univ, Dept Energy Sci, Inst Basic Sci, Ctr Integrated Nanostruct Phys, Suwon 440746, South Korea

来源：

OPTICS LETTERS | 2013年 / 38卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

PATTERNED-SAPPHIRE SUBSTRATE; GAN; EFFICIENCY;

D O I：

10.1364/OL.38.001491

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this Letter, a light-emitting diode (LED) with prism-shaped-air-ring microstructures (PSAMs) formed on flat sapphire substrate is demonstrated as an alternative design to face-up LEDs on patterned sapphire substrate (PSS) for enhanced light extraction efficiency. In this LED design, the emitted photons can be deflected to the top of the chip for its effective extraction, contrary to the PSS-LED wherein photons are guided to sapphire and get absorbed by packaging materials. The PSAM-LED showed an enhancement in the radiometric power as high as 10% with a low far-field angle of 129 degrees over that of a PSS-LED under an injection current of 20 mA. (C) 2013 Optical Society of America

引用

页码：1491 / 1493

页数：3

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