文献类型：期刊文献

英文题名：Study on photoluminescence and thermoluminescence of Y2-xSmxMgTiO6 phosphors

作者：Liu, Hao[1];Wang, Lu-Yan[1];Xiong, Zheng-Ye[1];Guo, Jing-Yuan[1]

机构：[1]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China

年份：2025

卷号：36

期号：7

外文期刊名：NUCLEAR SCIENCE AND TECHNIQUES

收录：SCI-EXPANDED(收录号：WOS:001485487700003)、、EI(收录号：20252018425511)、Scopus(收录号：2-s2.0-105004917710)、WOS

基金：This work was supported by the Zhanjiang Science and Technology Plan Project (No. 2022A05022), Science and Technology Development Special Project of Zhanjiang (No. 2023A21616) and Research Project of Guangdong Ocean University (No. 060302112102).

语种：英文

外文关键词：Y2-xSmxMgTiO6; Thermoluminescence; T-m-T-stop; Computerized glow curve deconvolution; Dose-response

外文摘要：Double perovskite matrix materials have recently attracted considerable interest due to their structural flexibility, ease of doping, and excellent thermal stability. While photoluminescence (PL) studies of rare-earth-doped double perovskites are common, research on their thermoluminescence (TL) properties is less extensive. This study synthesized a series of Y2-xSmxMgTiO6 (0 <= x <= 0.1) samples using a high-temperature solid-state method. X-ray diffraction (XRD) analysis confirmed a monoclinic crystal structure (space group P2(1)/n), with Sm3+ ions substituting for Y3+ ions in Y2MgTiO6. The PL results indicated that the optimal doping concentration was Y1.95Sm0.05MgTiO6, exhibiting emission peaks at 568, 605, 652, and 715 nm under 409 nm blue light excitation. The TL measurements for different doping concentrations showed that the Y1.98Sm0.02MgTiO6 phosphors exhibited the strongest TL signals. The TL peaks observed at 530 and 610 K correspond to defects in the matrix and Sm3+ dopants, respectively. The T-m-T-stop analysis revealed that the TL curve of Y(1.98)Sm(0.02)MgTiO(6)phosphors was a superposition of seven peaks. Computerized glow curve deconvolution (CGCD) was performed on the TL of the sample according to the results of three-dimensional thermoluminescence spectra (3D-TL) and T-m-T-stop, and the trap depths in the sample were estimated to range from 0.69 to 1.49 eV. Additionally, the lifetimes of each overlapping peak were calculated using the fitting parameters. Furthermore, the dose-response test showed that the saturation dose of the sample was high (9956 Gy). Therefore, this material can serve as a thermoluminescent dosimeter for high-dose measurements. The saturation dose for the lowest-temperature overlapping peak was 102 Gy, which correlated with its specific energy-level lifetime, whereas the other overlapping peaks also exhibited favorable linear relationships.