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 Sr<sub>4</sub>La(PO<sub>4</sub>)<sub>3</sub>O:Ce<sup>3+</sup>, Tb<sup>3+</sup>, Mn<sup>2+</sup> (abbreviated as SLPO:Ce, Tb, Mn). We then examined their heat consistency, luminescence, as well as energy shift from Ce<sup>3+</sup> to Tb<sup>3+</sup> and Mn<sup>2+</sup>. We can acquire a considerable boost for the faint emission in green generated by Tb<sup>3+</sup> as well as the emission in red generated by Mn<sup>2+</sup> via adding the sensitizer Ce<sup>3+</sup> ions. Through modifying the proportion between Ce<sup>3+</sup> and Tb<sup>3+</sup> along with the proportion between Ce<sup>3+</sup> and Mn<sup>2+</sup>, 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 Sr<sub>4</sub>La(PO<sub>4</sub>)<sub>3</sub>O: 0.12Ce<sup>3+</sup>, 0.3Mn<sup>2+</sup>. Such result displays the promising efficiency of phosphors Sr<sub>4</sub>La(PO<sub>4</sub>)<sub>3</sub>O:Ce<sup>3+</sup>, Tb<sup>3+</sup>, Mn<sup>2+</sup> for the WLED devices.