Continuous tunable multi-chromatic emission of fluorphosphate glass under varying UV light excitation

A kind of Tm3+/Dy3+ co-doped fluorphosphate glass was prepared by the melt quenching method for continuous tunable multi-chromatic phosphors. The emission and excitation spectra of the glass showed that the color of luminescence can be tuned from blue/cold white to warm white/yellow by controlling the wavelength of exciting light. White light emission can be achieved under 353 nm and 362 nm UV light excitation. In addition, energy transfer mechanisms between Tm3+ and Dy3+ were also analyzed. The relationship between the color coordinate and the excited wavelength was also established. The Tm3+/Dy3+ co-doped fluorphosphate glass may be potential candidates for tunable multi-chromatic phosphor application.