Effects of the surface area of phosphor powders on colour coordinate variance

Abstract

In this study, the colour coordinate behaviours according to the surface area of phosphors were investigated to implement the colour coordinate of the desired zone in a random colour coordinate. For this purpose, the mixing ratio and dispensing amount of a green phosphor (Ce: YAG) and three red phosphors (CaAlSiN 3 :Eu 2+ ) with different specific surface areas were adjusted, and the corresponding colour coordinate behaviour was examined. As a result, the colour coordinate behaviour was found to be considerably influenced by the mixing ratio of red and green phosphors and the surface area of the phosphor powder particles. In conclusion, the colour coordinate of the desired zone can be more efficiently implemented by predicting the characteristics of different types of phosphors and their colour coordinate behaviours. The findings of this study are expected to greatly increase the yield of the light-emitting diode industry.

Enhanced Luminous Flux of White Led using Flat Dual-layer Remote Phosphor Configuration

“…However, to make the phosphor design coordinate with the blue discharge example of the LED chip is a dicult issue which lessens brilliant adequacy. One of the conceivable ways to approach this issue is to advance the geometries or the molecule qualities of the remote phosphor to raise the glowing eectiveness utilizing patterned or shaped phosphor layers [6], multi-layer phosphor [7], nanoparticlemixed phosphor [8], and new phosphor material [9]. The second way includes the blending of the LED discharges utilizing a focal point reector to get the ascent of glowing adequacy [10].…”