A new red-emitting phosphor of Eu3+-doped Sr2MgMoxW1−xO6 for solid state lighting

Abstract

The white light-emitting diode has recently attracted great attention as a promising candidate for next generation lighting. The solid solution of Sr1.80Eu0.10Li0.10MgMoxW1−xO6 was synthesized via high-temperature solid-state reaction and this solid solution is treated as a promising red emitting phosphor for white light-emitting diodes. In our cases, the X-ray diffraction, excitation spectra, emission spectra and decay curves of these solid solutions were measured as a function of the Mo/W ratio to characterize the structural and luminescent properties. The excitation bands of the series of phosphors are consistent well with the region of near ultraviolet light, and the phosphors present better color purity than the commercial phosphor Y2O2S:Eu3+ in current use. Taking these properties into consideration, this kind of material may find a great potential application as a red phosphor for near-ultraviolet excited white light-emitting diodes.