Improving Performance and Reducing Amount of Phosphor Required in Packaging of White LEDs With ${\rm TiO}_{2}$ -Doped Silicone

Abstract

White light-emitting diodes (LEDs) assembled by doping TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> 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.