Spectral tailoring is achieved in the phosphor Na0.6Rb0.4BaB9O15 (NRBBO): Eu2+ using chemical pressure. The gradual decrease of FWHM under chemical pressure of Rb+ ions. WLED based on NRBBO: 0.11Eu2+ have a color gamut of 106% NTSC. The excellent laser excitation properties of NRBBO: 0.11Eu2+ give it great potential as a green phosphor for laser display.
Abstract
Due to its outstanding performance, laser display technology has received extensive attention. Specifically, in this study, a novel narrow-band green phosphor, Na0.6Rb0.4BaB9O15 (NRBBO): Eu2+, for laser display is obtained. Under chemical pressure, Eu2+ migrates from Ba2+ 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 Eu2+ lattice sites under chemical pressure is verified by XRD refinement, low-temperature spectrum and EXAFS. NRBBO: 0.11Eu2+ 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: 0.11Eu2+ under 90.7 W mm−2 laser excitation reaches 2081.6 lm without light saturation. Meanwhile, the excellent CL performance demonstrates that NRBBO: 0.11Eu2+ exhibits stability under high energy density. NRBBO: 0.11 Eu2+ – based WLED achieves a color gamut of 106% NTSC. The excellent performance of NRBBO: 0.11Eu2+ demonstrates great potential as a green phosphor for laser display applications.
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