Preparation And Luminescence Properties Of The Long Afterglow Luminescent Materials Of Tin

Long afterglow luminescent material is a kind of light emitting material, which generates light at the same time as the external light source is excited, and absorbs the light energy and stores it in the form of light. Long afterglow luminescent material due to its unique afterglow properties, is widely used in the luminous materials, safety instructions and weak light emergency lighting and other aspects. In many long afterglow luminescent materials, the alkaline earth stannate system has good luminescent properties, chemical and thermal stability, low cost and so on. Therefore, the alkaline earth stannate long afterglow luminescence materials attract more and more attention by researchers. In this paper, some new fields and systems of rare earth doped MSnO3 and M?SnO4 have been studied to find a better method for the synthesis of materials, a better performance of stannate.The long afterglow characteristics of Ca2SnO4:Dy3+ and Ca2SnO4:Er3+ phosphors were synthesized by conventional solid-state method. The structure of the sample was characterized by XRD. By measuring the excitation and emission spectra of the sample, the fluorescence properties of the samples are investigated. The afterglow properties of the samples were studied by the decay curve of the samples. Through the analysis of the thermal luminescence spectroscope of the sample, we calculated the important influence factors and the mechanism of the afterglow properties of the trap depth and the concentration of the long afterglow material.CaSnO3:Nd3+, CaSnO3:Gd3+ and CaSnO3:Dy3+ phosphors were prepared via a solid-state reaction method. The structure of the sample was characterized by XRD. Their fluorescence properties were discussed by measuring their excitation emission spectra. The afterglow properties of the samples were studied by the decay curve of the samples. Through the analysis of the thermal release spectra of the sample, we calculated the important influence factors and the mechanism of the afterglow properties of the trap depth and the concentration of the long afterglow material.Long afterglow phosphors of Sr2SnO4:Sm3+ added alkali ions (K+, Na+) were prepared via solid-state reaction. The structure of the sample was characterized by XRD. The luminescence properties and the effect of the doping concentration on the luminescence intensity of the sample were investigated by measuring the excitation and emission spectra of the sample. The afterglow properties of the samples were studied by the decay curve of the samples. Through the analysis of the thermal release spectra of the sample, we calculated the important influence factors of the depth of the trap and the properties of the afterglow of the concentration and the effect of alkali metal ions on the long afterglow luminescence properties.