High thermal stability AlN-YAG: Ce composite phosphor ceramics for high-power laser-driven lighting

In this paper, AlN-YAG: Ce composite phosphor ceramics with high thermal conductivity was prepared by accompanying YAG: Ce phosphor with an AlN matrix. The phosphor ceramics was densified at 1700 degrees C for 3 h, and YAG: Ce phosphor particles were uniformly dispersed in the AlN matrix without any chemical reaction and impure phases around the contact interfaces. The thermal conductivity of the sample with 10wt. % YAG: Ce phosphor was as high as 68.8W m(-1) K-1. As a result, the saturation power density is up to 39.6W mm(-2) with a luminous emittance of 1516 lm mm(-2), showing excellent resistance to high flux density photon irradiation. This work presents a method to enhance the thermal conductivity of phosphor ceramics for high power laser lighting. Published under an exclusive license by AIP Publishing.

Automated summary

This paper describes the preparation of AlN-YAG: Ce composite phosphor ceramics with high thermal conductivity by incorporating YAG: Ce phosphor into an AlN matrix. The resulting ceramics exhibit excellent resistance to high flux density photon irradiation, making them promising for high power laser lighting applications.