Light efficiency of high brightness LED package with nanoparticle-mixed silicone encapsulant

The light efficiency of high brightness LED was improved with TiO 2 -nanoparticle-mixed encapsulant in this study. Well-dispersed TiO 2 nanoparticles with size of 2 – 6 nm was synthesized by lowering pH of reaction solution. The well-dispersed TiO 2 nanoparticles were mixed with encapsulant and the light efficiency of LED was dependent on the dispersion of TiO 2 . The weight percentages of the TiO 2 nanoparticles in encapsulant were 0, 5, and 10 wt %. The light efficiency of the LED package increased by 12.4 % when 10 wt% TiO 2 nanoparticles were mixed with the encapsulant of the LED package.