Abstract This work presents the structural, morphological, upconversion luminescence and Thermoluminescence properties of Sr2CeO4:Er3+,Yb3+ (SCO:Er, Yb) phosphors synthesized by a simple combustion method. The X-ray diffraction technique revealed that all the samples maintained their orthorhombic phase even for Yb concentrations as high as 12 mol%. Moreover, the morphological analysis by scanning electron microscopy (SEM) pointed out that SCO microparticles with sizes in the range of 0.2 μm–7.2 μm were obtained in samples doped with 0–3 mol% of Yb, but coalesced microparticles were observed for Yb concentrations from 7 to 12 mol%. The luminescence measurements demonstrated that the SCO: Er, Yb microparticles produced red and green upconversion emission bands and the red component increases with the Yb concentration. Also, the TL signals were recorded after solar/UV irradiation and found TL emission bands in the range of 60–150 °C and 150–350 °C. The traps responsible of the TL emissions were the oxygen vacancies.

中文翻译：

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Yb3+ 共掺杂剂对 Sr2CeO4:Er3+、Yb3+ 荧光粉上转换和热释光发射的影响

摘要 本工作介绍了通过简单燃烧法合成的 Sr2CeO4:Er3+,Yb3+ (SCO:Er, Yb) 荧光粉的结构、形态、上转换发光和热发光特性。X 射线衍射技术表明，即使 Yb 浓度高达 12 mol%，所有样品仍保持其正交相。此外，扫描电子显微镜 (SEM) 的形态分析指出，在掺杂 0-3 mol% Yb 的样品中获得尺寸在 0.2 μm-7.2 μm 范围内的 SCO 微粒，但观察到聚结的微粒 Yb 浓度7 至 12 mol%。发光测量表明，SCO: Er、Yb 微粒产生红色和绿色上转换发射带，并且红色成分随着 Yb 浓度的增加而增加。还，在太阳/紫外线照射后记录 TL 信号，发现 TL 发射带在 60–150 °C 和 150–350 °C 范围内。负责 TL 排放的陷阱是氧空位。