The color-adjustable phosphor Sr4La(PO4)3O:Ce3+,Tb3+,Mn2+ of WLEDs: luminescence and transfer of energy characteristics

Abstract

A high heat solid-state technique was used to produce a set of phosphor Sr₄La(PO₄)₃O:Ce³⁺,Tb³⁺,Mn²⁺ (Sr:Mn). In Sr₄La(PO₄)₃O, the luminescence characteristics, heat resistance, and energy conversion between Ce³⁺ and Tb³⁺ as well as Mn²⁺ were thoroughly researched. Introducing the activator Ce³⁺ particles can significantly increase the dim green-emitting from Tb³⁺ and the red-emitting from Mn via energy conversion. The color of the emissions might be changed by adjusting the Ce³⁺/Tb³⁺ and Ce³⁺/Mn²⁺ ion ratios. In the Sr₄La(PO₄)₃O: 0.12 Ce³⁺,0.3 Mnz²⁺ specimen, we achieved white-emitting illumination, yielding hue coefficients (0.3326, 0.3298), showing that the phosphor Sr:Mn could have promising implications for white light-emitting diodes (WLEDs).