Red/Blue-Shift Dual-Directional Regulation in Blue-Emitting CaBaSiO:Eu Phosphor on Incorporation of Eu/Mg Ions.

Blue-emitting phosphors with composition (CaBa)MgSiO: yEu ( x = 0 to 0.11, y = 0.01 to 0.08) have been synthesized via a high-temperature solid-state reaction route and the effects of Mg and Eu codoping on their morphology, crystal structure, and luminescence properties were investigated. For (CaBa)MgSiO:0.04Eu, the color changed from light-blue to deep-blue region with increasing Mg content from x = 0 to x = 0.11. For (CaBa)MgSiO: yEu, the emission band showed the opposite shift with increasing y from 1% to 8%. Interestingly, increasing Mg addition led to significant reduction in the full-width at half-maximum (FWHM) from 100 nm to 70 nm. Compared with Mg-free samples, the emission intensity of the Mg-containing material with x = 0.07 was enhanced by ∼100%. The optimum doping levels of Mg and Eu were 0.07 and 0.02 for (Ca Ba)MgSiO:0.04Eu and (CaBa)MgSiO: yEu, respectively. These results indicate that such materials could be good candidate blue-emitting phosphors for use in solid-state lighting and displays. [ABSTRACT FROM AUTHOR]