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- W2479388384 abstract "Green light emitting Zn2SiO4:Mn2+ phosphors have been synthetised by the solid-state reaction in ambient atmosphere at 1300 °C for 2 h, with ZnO, SiO2 and MnO2 as the reagents. The ZnO/SiO2 molar ratio varied from 2 to 0.5. The doping level was in a lower concentration range (0.01≤x≤0.05). The effect of both the Mn2+ concentration and ZnO/SiO2 molar ratio on luminescence intensity and decay was investigated in detail. The microstructure and phase composition of prepared phosphors were characterised by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). XRD results indicate that the pure α-Zn2SiO4 phase with rhombohedral structure was obtained after heat treatment. The prepared phosphors exhibit a strong green emission centred at 525 nm from the 4T1→6A1 forbidden transition. The highest emission intensity was observed for phosphors with ZnO/SiO2 molar ratio equal to 1.0, and the Mn2+ concentration x=0.03 (ZSMn3). The emission intensity of the ZSMn3 phosphor is comparable with the commercial Zn2SiO4:Mn2+ phosphor. The decay curves can be characterised by double exponential function. After fitting a fast component τ1∼2 ms and a slow component τ2∼10 ms were obtained. The decay times decrease significantly with increasing Mn2+ concentration. The decay time and luminescence mechanism depend on the excitation light wavelength. Temperature dependent luminescence of the ZSMn3 phosphor in the temperature range of 25–200 °C was studied." @default.
- W2479388384 created "2016-08-23" @default.
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- W2479388384 date "2016-11-01" @default.
- W2479388384 modified "2023-09-24" @default.
- W2479388384 title "Photoluminescence of (ZnO)X-Z(SiO2)Y:(MnO)Z green phosphors prepared by direct thermal synthesis: The effect of ZnO/SiO2 ratio and Mn2+ concentration on luminescence" @default.
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- W2479388384 doi "https://doi.org/10.1016/j.ceramint.2016.07.176" @default.
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