Synthesis and luminescence properties of novel KSrPO4:Dy3+ phosphor

A novel single-phase full-color phosphor KSrPO4:Dy3+ was synthesized by a high-temperature solid-state reaction. X-ray powder diffraction analysis confirmed the phase formation of KSrPO4:Dy3+ materials. The photoluminescence excitation and emission spectra and the concentration dependence of the emission intensity of the phosphor were investigated. The results show that the phosphor could be efficiently excited by the near-UV (NUV) light ranging from 340 to 440 nm, thus exhibiting blue (487 nm) and yellow (577 nm) light emissions corresponding to 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transitions, respectively. The luminescence intensity of KSr1−xPO4:xDy3+ phosphor first increased and then decreased with increasing Dy3+ concentration and reached the maximum intensity at x = 0.05. The calculated color coordinates lie in the blue white region. Thus, the prepared phosphors exhibit great potential for use as single-phase full-color phosphor for NUV white-light-emitting diodes.