Synthesis and optical properties of Y3Al5O12:Ce3+,Cr3+ nano-phosphor for white LED

In this paper, Y3Al5O12:Ce3+,Cr3+ (YAG:Ce3+,Cr3+) nano-phosphors are prepared by the co-precipitation method, the average particle size of the phosphor is ∼100 nm. In addition, two surface treatments are introduced to improve the homogeneity of the nanoparticles. One is the addition of an appropriate amount of sodium dodecyl sulfate, and the other is coating a carbon layer on the surface of the nanoparticles by a solvothermal method using glucose as the carbon source. The optical properties and mechanisms of the synthesized YAG:Ce3+,Cr3+ nano-phosphors are detailed analyzed in the text. The CIE color coordinates (0.30, 0.36) of the nanoscale YAG:Ce3+,Cr3+ phosphor combined with the 450 nm blue chip is close to standard white light, which has potential application in white LED.