Preparation and Luminescence Characteristics of Ca3Y2（BO3）4：Eu^3＋ Phosphor

Ca3Y2 （BO3）4：Eu^3＋ phosphor is synthesized by high temperature solid-state reaction method, and the Iuminescence characteristics are investigated. The emission spectrum exhibits two strong red emissions at 613 and 621 nm corresponding to the electric dipole ^5 Do- ^7F2 transition of Eu^3＋ under 365 nm excitation, the reason is that Eu^3＋ substituting for Y^3＋ occupies the non-centrosymmetric position in the crystal structure of Ca3 Y2 （BO3）4. The excitation spectrum for 613 nm indicates that the phosphor can be effectively excited by ultraviolet （UV） （254 nm, 365nm and 400nm） and blue （470nm） light. The effect of Eu^3＋ concentration on the emission intensity of Ca3 Y2 （BO3）4 ：Eu^3＋ phosphor is measured, the result shows that the emission intensities increase with increasing Eu^3＋ concentration, then decrease. The CIE colour coordinates of Ca3Y2 （BO3）4：Eu^3＋ phosphor is （0.639, 0.357） at 15mol% Eu^3＋.

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 colourcoordinates of Ca₃Y₂(BO₃)₄:Eu³⁺ phosphor is (0.639, 0.357) at 15mol% Eu³⁺.