Narrow-band green/red-emitting glass composites enabling highly stable patterned wheel for laser phosphor display
Laser phosphor display (LPD) technology offers high brightness, wide color gamut, and speckle-free operation, but the lack of laser-resistant bulk luminescent materials with narrow-band emission remains a critical bottleneck. This work presents a general strategy to fabricate phosphor-glass composites (PGCs) incorporating commercial red-emitting K2SiF6:Mn4+ (KSF:Mn4+) and green-emitting β-SiAlON:Eu2+ phosphors, achieving internal quantum efficiencies of 94.6% and 87.8%, respectively. The resulting phosphor wheels exhibit high luminous flux and efficiency: KSF:Mn-PGC reaches 684 lm and 21 lm W−1 mm−1, while β-SiAlON:Eu-PGC achieves 4770 lm and 172 lm W−1 mm−1, with mitigated thermal accumulation. Integrating these two PGCs into a patterned phosphor wheel yields a color gamut covering 125% of the Rec. 709 standard, significantly surpassing the 103% coverage of conventional YAG:Ce-based laser light sources. This approach enables the adaptation of commercial phosphors into bulk PGC materials, enhancing stability and promoting LPD development for next-generation display applications.