Luminescence properties of novel single-host white-light-emitting phosphor KBaBP2O8:Dy3+

A series of white-light-emitting KBaBP2O8:Dy3+ phosphors were synthesized by using a solid state reaction technique at high-temperature. X-ray diffraction and fluorescence spectroscopy measurements were utilized to characterize the structure and luminescence characteristics including excitation and emission spectra, decay curves, chromaticity coordinates of the assprepared phosphors. The influence of the doping concentration of Dy3+ on the relative emission intensity of Dy3+ was investigated. The critical distance as well as concentration quenching mechanism was calculated and confirmed. The as-prepared phosphors can be effectively excited with near ultraviolet, and exhibit white light emission with short decay time of milliseconds. The above work indicates these phosphors could be potential candidates as single-host white-light-emitting phosphors for application in white light-emitting-diodes.