DocumentCode
1693
Title
Improving Performance and Reducing Amount of Phosphor Required in Packaging of White LEDs With 
-Doped Silicone
Author
Pin-Chao Wang ; Yan-Kuin Su ; Chun-Liang Lin ; Guan-Syun Huang
Author_Institution
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Volume
35
Issue
6
fYear
2014
fDate
Jun-14
Firstpage
657
Lastpage
659
Abstract
White light-emitting diodes (LEDs) assembled by doping TiO2 nanoparticles with phosphor silicone encapsulation are investigated. The proposed method can improve lumen output by 2.7% and correlated color temperature deviation by 39%, and it can reduce the required amount of phosphor by 5% and junction temperature by 6.5 °C in white LED packaging. These improvements are attributed to the enhanced light scattering ability and refractive index of the encapsulation material and reduced light loss due to color mixing inside the packages, and they enhance light performance and reduce thermal accumulation. Therefore, results show that improving light output performance of white LEDs makes these LEDs advantageous for use in solid-state lighting.
Keywords
encapsulation; light emitting diodes; light scattering; nanoparticles; packaging; phosphors; refractive index; silicones; titanium compounds; TiO2; TiO2-doped silicone; color mixing; correlated color temperature deviation; junction temperature; light loss; light scattering; lumen output; nanoparticles; packaging; phosphor silicone encapsulation; refractive index; temperature 6.5 degC; white LED; Color; Doping; Encapsulation; Junctions; Light emitting diodes; Phosphors; Refractive index; ${rm TiO}_{2}$ nanoparticles; TiO₂ nanoparticles; White light-emitting diodes (LEDs); light scattering ability; refractive index of encapsulation material; refractive index of encapsulation material.;
fLanguage
English
Journal_Title
Electron Device Letters, IEEE
Publisher
ieee
ISSN
0741-3106
Type
jour
DOI
10.1109/LED.2014.2318037
Filename
6814295
Link To Document