Enhancement of optical extraction efficiency in white LED package with quantum dot phosphors and air-gap structure

被引：29

作者：

Shin, Min-Ho ^{[1
]}

Hong, Hyun-Guk ^{[1
]}

Kim, Hyo-Jun ^{[1
]}

Kim, Young-Joo ^{[1
]}

机构：

[1] Yonsei Univ, Sch Mech Engn, Seoul 120749, South Korea

来源：

APPLIED PHYSICS EXPRESS | 2014年 / 7卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

LIGHT-EMITTING-DIODES; LUMINOUS EFFICIENCY; CONFIGURATION; NANOCRYSTALS; CONVERSION; BLUE;

D O I：

10.7567/APEX.7.052101

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An efficient package configuration for a white-light-emitting diode based on quantum dot (QD) phosphors was proposed and fabricated with a polymer lens, remote QD polymer layers, and an air-gap structure. The optical extraction efficiency of the newly proposed air-gap structure showed enhancements of 33.0% by simulation and 29.7% by experiment as compared with that of a remote layer-by-layer QD structure without an air gap. This enhancement comes from the fact that some reemitted and scattered light from QDs can be reflected effectively by total internal reflection at the interface between the QD polymer layer and air to reduce the absorption loss in the package. (C) 2014 The Japan Society of Applied Physics

引用

页数：4

共 22 条

[1] A nearly ideal phosphor-converted white light-emitting diode [J].

Allen, Steven C. ;

Steckl, Andrew J. .

APPLIED PHYSICS LETTERS, 2008, 92 (14)

[2] ELiXIR - Solid-state luminaire with enhanced light extraction by internal reflection [J].

Allen, Steven C. ;

Steckl, Andrew J. .

JOURNAL OF DISPLAY TECHNOLOGY, 2007, 3 (02) :155-159

[3] Computational study of power conversion and luminous efficiency performance for semiconductor quantum dot nanophosphors on light-emitting diodes [J].

Erdem, Talha ;

Nizamoglu, Sedat ;

Demir, Hilmi Volkan .

OPTICS EXPRESS, 2012, 20 (03) :3275-3295

[4] A photometric investigation of ultra-efficient LEDs with high color rendering index and high luminous efficacy employing nanocrystal quantum dot luminophores [J].

Erdem, Talha ;

Nizamoglu, Sedat ;

Sun, Xiao Wei ;

Demir, Hilmi Volkan .

OPTICS EXPRESS, 2010, 18 (01) :340-347

[5] Strongly enhanced phosphor efficiency in GaInN white light-emitting diodes using remote phosphor configuration and diffuse reflector cup [J].

Kim, JK ;

Luo, H ;

Schubert, EF ;

Cho, JH ;

Sone, CS ;

Park, YJ .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2005, 44 (20-23) :L649-L651

[6] Extrahigh color rendering white light-emitting diode lamps using oxynitride and nitride phosphors excited by blue light-emitting diode [J].

Kimura, Naoki ;

Sakuma, Ken ;

Hirafune, Syunichiro ;

Asano, Kenichiro ;

Hirosaki, Naoto ;

Xie, Rong-Jun .

APPLIED PHYSICS LETTERS, 2007, 90 (05)

[7]

Lee J, 2000, ADV MATER, V12, P1102, DOI 10.1002/1521-4095(200008)12:15<1102::AID-ADMA1102>3.0.CO

[8]

2-J

[9] Design of the Ring Remote Phosphor Structure for Phosphor-Converted White-Light-Emitting Diodes [J].

Lin, Ming-Te ;

Ying, Shang-Ping ;

Lin, Ming-Yao ;

Tai, Kuang-Yu ;

Tai, Sheng-chieh ;

Liu, Chih-Hsuan ;

Chen, Jyh-Chen ;

Sun, Ching-Cherng .

JAPANESE JOURNAL OF APPLIED PHYSICS, 2010, 49 (07) :0721011-0721016

[10] Analysis of high-power packages for phosphor-based white-light-emitting diodes [J].

Luo, H ;

Kim, JK ;

Schubert, EF ;

Cho, J ;

Sone, C ;

Park, Y .

APPLIED PHYSICS LETTERS, 2005, 86 (24) :1-3

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