Highly crystalline ceramic-composite tricolor phosphor-in-glass film for high-performance laser-driven lighting

Ceramic-composite phosphor-in-glass films (PiGFs) are excellent candidates for high-power and stable Laser-driven (LD) lighting due to their excellent thermal management. However, the high temperatures in existing PiGF in-situ crystallization processes can damage the phosphor structure, limiting their development for high color rendering index (Ra) applications. In this study, a novel ceramic-composite tricolor PiGF system is co-sintered at a low temperature of 600 °C using a ZnO-Li 2 O-SiO 2 (ZLS) sintering matrix and incorporates β-Zn 2 SiO 4 glass-ceramic as a functional phase. This process achieves enhanced light scattering and thermal management while preserving the integrity of the tricolor phosphors. Through process optimization, the PiGF achieved bright white light with a luminous flux (LF) of 1361 lm @7.08 W and an Ra of 84.5. Finally, the PiGF was assembled into a laser lighting prototype, exhibiting an optimal balance between luminous intensity and color quality, rendering this color converter highly promising for high-quality laser lighting applications.