Abstract Herein, a new up-conversion temperature sensor of LiCaLa(W0.1Mo0.9O4)3:0.04 Er3+/0.1Yb3+ phosphors that exhibit strong luminescence intensity, improved and good repeatable temperature sensing performance and stability, was reported for the first time. All samples show typical tetragonal scheelite structures and exhibit typical up-conversion luminescence. Three distinct emission bands correspond to two strong green (2H11/2/4S3/2 → 4I15/2) and a weak red (4F9/2 → 4I15/2) bands, respectively. WO42− and MoO42− with similar properties can be replaced with each other to improve the crystal field and ultimately improve the luminescence efficiency. Interestingly, the fluorescence intensity ratios of the two sublevels (4S3/2(1) and 4S3/2(2)) and 2H11/2 increase with the increase of temperature, indicating the improvement of temperature sensing performance. The SA-max are 0.0134 K-1 and 0.0104 K-1, and SR-max are 0.0434 K-1 and 0.0548 K-1 for 2H11/2/4S3/2(1) and 2H11/2/4S3/2(2), respectively. Therefore, the tungstate-molybdate up-conversion luminescence materials has a potential application prospect of optical temperature sensor.

中文翻译：

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基于 Er3+/Yb3+ 共掺杂钨酸盐-钼酸盐上转换磷光体的 Stark 亚能级提高温度传感性能

摘要 在此，首次报道了一种新型的LiCaLa(W0.1Mo0.9O4)3:0.04 Er3+/0.1Yb3+ 荧光粉上转换温度传感器，该荧光粉具有较强的发光强度、改进和良好的可重复温度传感性能和稳定性。所有样品都显示出典型的四方白钨结构和典型的上转换发光。三个不同的发射带分别对应于两个强绿色 (2H11/2/4S3/2 → 4I15/2) 和一个弱红色 (4F9/2 → 4I15/2) 带。具有相似性质的 WO42- 和 MoO42- 可以相互替换以改善晶场并最终提高发光效率。有趣的是，两个亚级（4S3/2（1）和4S3/2（2））和2H11/2的荧光强度比随着温度的升高而增加，表明温度传感性能的提高。对于 2H11/2/4S3/2(1) 和 2H11/2/4S3/2(2)，SA-max 为 0.0134 K-1 和 0.0104 K-1，SR-max 为 0.0434 K-1 和 0.0548 K-1 ）， 分别。因此，钨钼酸盐上转换发光材料在光学温度传感器方面具有潜在的应用前景。