Emission color tuning via modulating PO43−/VO43− proportion in Gd(PxV1−x)O4: 1 at.% Dy3+: Realization of a promising single-phased white-light-emitting phosphor at x = 0.3

A kind of promising single-phased white-light-emitting phosphor of Gd(P0.3V0.7)O4: 1at.% Dy3+ was achieved by modulating PO43−/VO43− proportion in Gd(PxV1−x)O4: 1at.% Dy3+. A series of measurements as X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), energy dispersive spectroscopy (EDS), photoluminescence excitation (PLE), photoluminescence (PL), fluorescence lifetime and absorption spectrum were carried out. The measured PL spectra reveal that the intensity of broad band emission from VO43− can be regulated by changing the doping proportions of PO43−/VO43−, as PO43− may block energy transfer from VO43− to Dy3+. The combination of VO43− emission band and Dy3+ characteristic emitting realized white-light-emitting. We packaged a wLED (white-light-emitting diode) based on a UV-chip and Gd(P0.3V0.7)O4: 1 at.% Dy3+ phosphor and achieved white light emission. Spectroscopic parameters were calculated by Judd-Ofelt theory in detail from fitting absorption spectrum, and quantum efficiency was calculated to be 53.34%. These results demonstrate that single-phased Gd(P0.3V0.7)O4: 1 at.% Dy3+ can be a good candidate for manufacturing UV-activated white-light-emitting diodes. •High purity single-phased white-light-emitting phosphor.•J-O parameters and spectroscopic parameters were calculated.•WLED was fabricated by combining synthesized phosphor with UV chip.