A Novel Liquid Packaging Structure of Deep-Ultraviolet Light-Emitting Diodes to Enhance the Light-Extraction Efficiency

被引：24
作者：
Kang, Chieh-Yu [1 ,2 ]
Lin, Chih-Hao [1 ,2 ]
Wu, Tingzhu [3 ]
Lee, Po-Tsung [1 ,2 ]
Chen, Zhong [3 ]
Kuo, Hao-Chung [1 ,2 ]
机构：
[1] Natl Chiao Tung Univ, Coll Elect & Comp Engn, Dept Photon, Hsinchu 30010, Taiwan
[2] Natl Chiao Tung Univ, Coll Elect & Comp Engn, Inst Electroopt Engn, Hsinchu 30010, Taiwan
[3] Xiamen Univ, Fujian Engn Res Ctr Solid State Lighting, Dept Elect Sci, Xiamen 361005, Peoples R China
来源：
CRYSTALS | 2019年 / 9卷 / 04期
关键词：
deep-ultraviolet light emitting diode; silicone oil; liquid packaging; SOLAR-CELLS; UV;
D O I：
10.3390/cryst9040203
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
To realize high-efficiency, AlGaN-based, deep-ultraviolet light-emitting diodes (DUV-LEDs), enhancing their light-extraction efficiency and reducing thermal resistance is very crucial. We proposed a liquid packaging structure that could enhance optical power by 27.2% and 70.7% for flat type and lens type 281-nm DUV-LEDs, respectively. A significant improvement effect at different wavelengths, such as 268 nm and 310 nm, was also observed. Furthermore, using the liquid packaging structure, the thermal resistance was reduced by 30.3% compared to the conventional structure. Finally, the reliability of liquid packaging DUV-LEDs was tested. The light output maintenance of liquid packaging DUV-LEDs was compared to the conventional structure.
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页数：9
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