The impacts from Sr4La(PO4)3O: Ce3+, Tb3+, Mn2+ phosphor resulting in luminous flux of WLED devices

Abstract

Using the solid-state technique that involves great temperature, we created multiple phosphors Sr₄La(PO₄)₃O:Ce³⁺, Tb³⁺, Mn²⁺ (abbreviated as SLPO:Ce, Tb, Mn). We then examined their heat consistency, luminescence, as well as energy shift from Ce³⁺ to Tb³⁺ and Mn²⁺. We can acquire a considerable boost for the faint emission in green generated by Tb³⁺ as well as the emission in red generated by Mn²⁺ via adding the sensitizer Ce³⁺ ions. Through modifying the proportion between Ce³⁺ and Tb³⁺ along with the proportion between Ce³⁺ and Mn²⁺, it is possible to adjust the chroma of emission. We acquired white illumination which had color coordinates determined as (0.3326, 0.3298) for the testing phosphor Sr₄La(PO₄)₃O: 0.12Ce³⁺, 0.3Mn²⁺. Such result displays the promising efficiency of phosphors Sr₄La(PO₄)₃O:Ce³⁺, Tb³⁺, Mn²⁺ for the WLED devices.