Obtaining higher LED’s lighting chromaticity and luminosity with SiO2 particles at different diameters

Abstract

This research delves into the promising applications of silicon dioxide (SiO₂) nanoparticles related to their ability to enhance the conversion efficiency for luminescent materials through modifications in scattering effects. In addition, the study uses the semi-spherical lens packaging structure in preparing the LED models, owing to its advantages in achieving higher light extraction and minimal total internal reflection loss. The core objective of this paper is to augment existing knowledge by incorporating SiO₂ nanoparticles uniformly into the silicone encapsulation of phosphor-converted white LEDs employing an SSL structure. The investigation includes the examination of the scattering coefficients through SiO₂-only samples with varying diameters of the nanoparticles, offering insights into the intrinsic properties of SiO₂ in the context of LED encapsulation. Subsequently, the study explores the nuanced impact of SiO₂/phosphor layers on crucial LED performance metrics, including luminous efficacy, color rendering factor, and angular Correlated Color Temperature. SiO₂ particle sizes ranging from 1 to 10 microns are considered, revealing that SiO₂ with specific radii contributes to discernible improvements in targeted LED lighting properties. These findings propel the exploration of SiO₂-enhanced LED technologies, introducing novel dimensions for optimizing efficiency and tailoring LED solutions to meet diverse lighting requirements.