双波长Pr3+掺杂12CaO·7Al2O3的光存储特性

采用化学共沉淀法制备了Pr3+掺杂的12CaO·7Al2O3(C12A7:Pr3+)材料.通过X射线衍射(XRD)、发射光谱、激发光谱、余辉衰减曲线、热释发光及光激励发光等测试手段系统研究了C12A7:Pr3+材料的微观结构和光学性质.结果表明,C12A7是一种理想的适合Pr3+掺杂的基质材料,C12A7:Pr3+具有...

Two-wavelength Optical Storage Properties of 12CaO · 7Al2O3: Pr3 + Phosphor

Pr³⁺-doped 12CaO·7Al₂O₃ (C12A7 ∶ Pr³⁺) powders were prepared using the coprecipitation method and were characterized by XRD, excitation and emission spectra, fluorescence lifetime, afterglow decay, thermoluminescence and photostimulated luminescence. The emission peaks at 491,535,614 nm are attributed to the transition of ³P₀→³H₄, ³P₀→³H₅ and ¹D₂→³H₄ of Pr³⁺ ions. The long afterglow emission locate at 491,535,614 nm, the time of the afterglow emission is about 300 s. By fitting the thermoluminescence spectrum data, the depth of the trap is about 0.63 eV. After the samples were irradiated by UV light (230 nm) for 5 min and placed in the dark for 5 min to drain the afterglow,the intensive photostimulated luminescence(PSL)is observed under infrared excitation (808 nm) due to the existence of the shallow traps. Our results indicate that C12A7 ∶ Pr³⁺ phosphor with three-wavelength phosphorescence and two-wavelength optical storage can be used in optical storage field as one kind of multi-dimension recording materials.