Photoluminescent properties of new phosphor Sr₂ZnSi₂O₇: M (M=Mn²⁺, Tb³⁺)

Abstract

New phosphors Sr₂ZnSi₂O₇: M (M=Mn²⁺, Tb³⁺) were synthesized through solid-state reaction, and their photoluminescent properties under UV and VUV region were investigated. The results showed that Sr₂ZnSi₂O₇:Mn²⁺ emitted green light with the strongest emission peak centered at 525 nm, and its quenching concentration under 254 and 147 nm excitation occurred at x = 0.08 and 0.06, respectively. Sr₂ZnSi₂O₇: Tb³⁺ emitted green light with the strongest emission peak centered at 541 nm, and its quenching concentration under 254 and 147 nm excitation also appeared at y = 0.25. At 147 nm excitation, the emission intensities of Sr₂Zn_0.94Si₂O₇: 0.06Mn²⁺ and Sr_1.75ZnSi₂O₇: 0.25Tb³⁺ phosphors were 54% and 36% of that of Zn_1.96SiO₄:0.04Mn²⁺, respectively. And their decay times (τ_1/e) were about 3.18 ms and 3.9 ms, respectively.

Keywords

Sr₂ZnSi₂O₇: Mn²⁺, Tb³⁺ / phosphor / UV / VUV

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