Abstract The crystal structure and surface morphology of the Er3+/Yb3+/Na+:ZnWO4 phosphors synthesized by solid state reaction method were analyzed by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analysis. The frequency upconversion (UC) emission study in the developed phosphors was investigated by using 980 nm laser diode excitation. The effect of codoping in the Er3+:ZnWO4 phosphors on the UC emission intensity was studied. The UC emission bands exhibited in the blue (490 nm), green (530, 552 nm), red (668 nm) and NIR (800 nm) region correspond to the 4F7/2→4I15/2, 2H11/2, 4S3/2→4I15/2, 4F9/2→4I15/2 and 4I9/2→4I15/2 transitions, respectively. The temperature sensing performance of the Er3+-Yb3+-Na+:ZnWO4 phosphors was investigated based on the 2H11/2→4I15/2 and 4S3/2→4I15/2 thermally coupled transitions of the Er3+ ions. The photometric study was also done for the developed phosphors.

中文翻译：

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Er3+-Yb3+-Na+:ZnWO4 荧光粉，用于增强可见光上转换和温度传感应用

摘要 采用X射线衍射(XRD)和场发射扫描电子显微镜(FESEM)分析了固相反应法合成的Er3+/Yb3+/Na+:ZnWO4荧光粉的晶体结构和表面形貌。通过使用 980 nm 激光二极管激发研究了开发的磷光体中的频率上转换 (UC) 发射研究。研究了共掺杂 Er3+:ZnWO4 荧光粉对 UC 发射强度的影响。在蓝色 (490 nm)、绿色 (530, 552 nm)、红色 (668 nm) 和 NIR (800 nm) 区域显示的 UC 发射带对应于 4F7/2→4I15/2、2H11/2、4S3/ 2→4I15/2、4F9/2→4I15/2 和 4I9/2→4I15/2 分别转换。Er3+-Yb3+-Na+的感温性能：基于 Er3+ 离子的 2H11/2→4I15/2 和 4S3/2→4I15/2 热耦合跃迁研究了 ZnWO4 荧光粉。还对开发的磷光体进行了光度研究。