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

Abstract

New phosphors Sr 2 ZnSi 2 O 7 : M (M=Mn 2+ , Tb 3+ ) were synthesized through solid-state reaction, and their photoluminescent properties under UV and VUV region were investigated. The results showed that Sr 2 ZnSi 2 O 7 :Mn 2+ 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. Sr 2 ZnSi 2 O 7 : Tb 3+ 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 Sr 2 Zn 0.94 Si 2 O 7 : 0.06Mn 2+ and Sr 1.75 ZnSi 2 O 7 : 0.25Tb 3+ phosphors were 54% and 36% of that of Zn 1.96 SiO 4 :0.04Mn 2+ , respectively. And their decay times (τ 1/e ) were about 3.18 ms and 3.9 ms, respectively.

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