Effect of alkali metal ions on structure and luminescent properties of red emitting β-Ca3(PO4)2:Eu3+ phosphor

Abstract

In this article, red emitting β-Ca3(PO4)2:Eu3+ phosphors were synthesized by conventional solid state method, phase transformation and photoluminescence at different temperatures and Eu3+ concentrations were discussed. Effect of co-doping alkali metal ions A+ (A = Li, Na, K) on the structure and luminescent properties of Ca3(PO4)2:Eu3+ phosphor was investigated and compared, Li+ ion is confirmed to be the most suitable charge compensator for Ca3(PO4)2:Eu3+ phosphor. The fabrication of a prototype red light emitting diode show the prepared Ca3(PO4)2:Eu3+ phosphor compensated by Li+ ion can be considered as a more promising red candidate used for near ultraviolet chip based light emitting diodes.