Changes in Crystal Structure and PL Property for Ca₂(Si, P)O₄:Eu²⁺ Phosphor by Addition of Al³⁺ Ion

Abstract

In this work, we investigated the crystal structure and photoluminescence (PL) property of Ca 2 (Si,P)O 4 :Eu 2+ phosphor doped with Al 3+ ions. Changes in the crystal structure were evaluated via X-ray diffraction and X-ray absorption fine structure measurements. With increasing concentrations of Al and P ions, the crystal structure transforms from β to α' L phase. The emission color of phosphor changes from green to blue. However, Al ions exerted only a modest effect on the crystal structure and PL property of the material compared with the absence of Al ions.