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 :
