Highly efficient GaN-based high-power flip-chip light-emitting diodes

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成果类型：

期刊论文

作者：

Zhou, Shengjun;Liu, Xingtong;Yan, Han;Chen, Zhiwen;Liu, Yingce;...

通讯作者：

Liu, Sheng

作者机构：

[Liu, Sheng; Liu, Xingtong; Zhou, Shengjun] Wuhan Univ, Res Ctr Elect Mfg & Packaging Integrat, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China.

[Liu, Sheng; Chen, Zhiwen; Liu, Xingtong; Zhou, Shengjun] Wuhan Univ, Inst Technol Sci, Wuhan 430072, Hubei, Peoples R China.

[Yan, Han] Wuhan Univ Technol, Sch Mech & Elect Engn, Wuhan 430070, Hubei, Peoples R China.

[Liu, Yingce] Xiamen Changelight Co Ltd, Xiamen 361000, Fujian, Peoples R China.

通讯机构：

[Liu, Sheng] W

Wuhan Univ, Res Ctr Elect Mfg & Packaging Integrat, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China.

Wuhan Univ, Inst Technol Sci, Wuhan 430072, Hubei, Peoples R China.

语种：

英文

关键词：

Bragg reflectors;Integrating spheres;Light extraction;Numerical simulation;Quantum efficiency;Vertical cavity surface emitting lasers

期刊：

Optics Express

ISSN：

1094-4087

年：

2019

卷：

期：

页码：

A669-A692

DOI：

10.1364/OE.27.00A669

基金类别：

National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [U1501241, 51675386, 51775387]; National Key R&D Program of China [2017YFB1104900]; Hubei Province Science Fund for Distinguished Young Scholars [2018CFA091]

机构署名：

本校为其他机构

院系归属：

机电工程学院

摘要：

High-power flip-chip light-emitting diodes (FCLEDs) suffer from low efficiencies because of poor p-type reflective ohmic contact and severe current crowding. Here, we show that it is possible to improve both the light extraction efficiency (LEE) and current spreading of an FCLED by incorporating a highly reflective metallic reflector made from silver (Ag). The reflector, which consists of an Ag film covered by three pairs of TiW/Pt multilayers, demonstrates high reflectance of 95.0% at 460 nm at arbitrary angles of incidence. Our numerical simulation and experimental results reveal that the FC...

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Highly efficient GaN-based high-power flip-chip light-emitting diodes

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