Herein we report the structural, morphological, photoluminescence (PL) and thermoluminescence (TL) properties of Li co-doped CaSO₄:Ce³⁺ nanophosphors prepared successfully via co-precipitation method. The PXRD pattern confirmed the single-phase hexagonal structure with space group P3₁21(152) with JCPDS Card no. 76-02312. The average crystallite size was estimated by Scherrer’s and W-H methods are found to be in the range 40-90 nm. These results are well agreed with the TEM results. The SEM micrographs reveal a wire-like structure with an average size ranging from 80-110 nm. Under 293 nm excitation, the effective blue emission positioned at 305 and 328 nm which are characteristic of 5d → 4f (²F_5/2 and ²F_7/2) of Ce³⁺ ions. PL emission intensity is increased with an increase in Li⁺ ion concentration and reached a maximum of 5 mol% and then started decreasing. The results show that the addition of Li⁺ ions in CaSO₄:Ce³⁺ lattice could induce a significant improvement of their PL intensity. The chromaticity coordinates and correlated color temperature of all the phosphors were studied and found to be located in the blue region. The TL response of the prepared nanophosphors to 10Gy-5 KGy doses is studied and their kinetic parameters were discussed in detail. These outcomes specify that these phosphors are favorable material for luminescence centered optoelectronic devices.

本文中，我们报道了通过共沉淀法成功制备的Li共掺杂的CaSO ₄：Ce ³⁺纳米磷光体的结构，形态，光致发光（TL）和热致发光（TL）特性。PXRD图确认了JCPDS卡号为P3 ₁ 21（152）的空间群的单相六边形结构。76-02312。平均晶体尺寸通过Scherrer法估计，并且WH方法发现在40-90nm范围内。这些结果与TEM结果非常吻合。SEM显微照片显示出线状结构，其平均尺寸为80-110nm。在293 nm激发下，有效蓝光位于305和328 nm处，这是5d→4f（² F _5/2和² F _7/2）Ce ³⁺离子。PL发射强度随Li ⁺离子浓度的增加而增加，达到最大值5 mol％，然后开始下降。结果表明，在CaSO ₄：Ce ³⁺晶格中添加Li ⁺离子可以显着提高其PL强度。研究了所有荧光粉的色度坐标和相关色温，发现它们位于蓝色区域。研究了制备的纳米磷光体对10Gy-5 KGy剂量的TL反应，并详细讨论了其动力学参数。这些结果表明，这些磷光体是发光集中的光电器件的有利材料。