Chemical Pressure-Induced FWHM Narrowing in Narrowband Green Phosphors for Laser Displays with Ultra-High Saturation Thresholds.

Due to its outstanding performance, laser display technology has received extensive attention. Specifically, in this study, a novel narrow-band green phosphor, NaRbBaBO (NRBBO): Eu, for laser display is obtained. Under chemical pressure, Eu migrates from Ba to Na lattice sites in NRBBO, leading to a gradual decrease in the FWHM, making it more competitive for display applications. The existence of chemical pressure in the lattice is demonstrated through a high-pressure spectrum. The migration of Eu lattice sites under chemical pressure is verified by XRD refinement, low-temperature spectrum and EXAFS. NRBBO: 0.11Eu can be effectively excited by NUV and blue light, with an emission peak at 512 nm and a FWHM of 54 nm. It retains 82% of its luminescence intensity at 150 °C compared to room temperature. The luminous flux of NRBBO: 0.11Eu under 90.7 W mm laser excitation reaches 2081.6 lm without light saturation. Meanwhile, the excellent CL performance demonstrates that NRBBO: 0.11Eu exhibits stability under high energy density. NRBBO: 0.11 Eu - based WLED achieves a color gamut of 106% NTSC. The excellent performance of NRBBO: 0.11Eu demonstrates great potential as a green phosphor for laser display applications.