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- Title
用于AlGaN 基DUVLED 封装的高反射 镀铝DPC陶瓷基板.
- Authors
杨宇铭; 李 燕; 郑怀文; 于 飞; 杨 华; 伊晓燕; 王军喜; 李晋闽
- Abstract
Ni/Au coating films plated on traditional direct plated copper (DPC) ceramic substrates wil strongly absorb ultraviolet (UV) light. To enhance light extraction eficiency (LEE) of deep ultraviolet light emiting diodes (DUV LEDs), a DPC ceramic substrate plated with two metal coating films was designed and prepared. A Ni/Au film covering the pad of the DPC ceramic substrate can provide electrical interconnection for LEDs, and a high-reflection Al film partly covering the Ni/Au film can provide superior reflection for UV lig ht Optical, electrical and thermal properti es of the DUV LED packaged by the Al-plated DPC ceramic substrate and traditional DPC ceramic substrate with only one Ni/Au coating film were measured, and models of the packaged LED were established and analyzed. As a result, by using the Al-plated DPC ceramic substrate, the light output power (LOP) of the DUV LED is enhanced by 19.2%, while the wal plug eficiency (WPE) and the external quantum eficiency (EQE) are enhanced by 1.20 and 1.19 times, respectively. Furthermore, after aging tests for 160 h, LEDs packaged by Al-plated DPC ceramic substrates showed beter reliability. This Al-plated DPC ce¬ramic substrate provides a feasible way to improve the LEE of DUV LEDs by packaging.
- Subjects
CERAMICS; METAL coating; METALLIC films; ULTRAVIOLET radiation; PLATING; CERAMIC coating; ANTIREFLECTIVE coatings
- Publication
Chinese Journal of Liquid Crystal & Displays, 2020, Vol 35, Issue 10, p991
- ISSN
1007-2780
- Publication type
Article
- DOI
10.37188/YJYXS20203510.0991