Preparation and Luminescence Characteristics of Ca₃Y₂(BO₃)₄:Eu³⁺ Phosphor

Ca₃Y₂(BO₃)₄:Eu³⁺ phosphor is synthesized by high temperature solid-state reaction method, and the luminescence characteristics are investigated. The emission spectrum exhibits two strong red emissions at 613 and 621nm corresponding to the electric dipole ⁵D₀--⁷F₂ transition of Eu³⁺ under 365nm excitation, the reason is that Eu³⁺ substituting for Y³⁺ occupies the non-centrosymmetric position in the crystal structure of Ca₃Y₂(BO₃)₄. The excitation spectrum for 613nm indicates that the phosphor can be effectively excited by ultraviolet (UV) (254nm, 365nm and 400nm) and blue (470nm) light. The effect of Eu³⁺ concentration on the emission intensity of Ca₃Y₂(BO₃)₄:Eu³⁺ phosphor is measured, the result shows that the emission intensities increase with increasing Eu³⁺ concentration, then decrease. The CIE colour
coordinates of Ca₃Y₂(BO₃)₄:Eu³⁺ phosphor is (0.639, 0.357) at 15mol% Eu³⁺.