Abstract Nowadays, how to improve the accuracy of the temperature sensors has become a common concern of researchers. For this purpose, dual-emitting phosphors have been proposed as a novel optical thermometer because the two discriminate emission centers can avoid the error caused by spectral overlap. Herein, a new ratio-metric luminescent thermometer Gd2ZnTiO6(GZTO):Bi3+, Mn4+ is designed, which exhibits both red and blue luminescence under 375 nm excitation. Based on the different thermal sensitivity of Mn4+ and Bi3+ ions and the energy transfer from Bi3+ to Mn4+ ions, the luminescent thermometer reveals excellent thermal sensitivity (Sr = 2.4% K−1, Sa = 16.8%K−1) and a wide temperature measurement range (313–473 K). Both of them are superior to the most reported materials. In addition, the luminescence intensity of two ions matches the light absorption bands of photosynthetic pigment well, which indicates that GZTO: Bi3+, Mn4+ phosphors also have a great prospect as a plant growth lamp.

中文翻译：

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基于过渡金属离子掺杂下转换 Gd2ZnTiO6：Bi3+、Mn4+ 磷光体的多功能光学测温

摘要 如今，如何提高温度传感器的精度已成为研究人员普遍关心的问题。为此，双发射荧光粉被提出作为一种新型光学温度计，因为两个不同的发射中心可以避免光谱重叠引起的误差。在此，设计了一种新型比率式发光温度计 Gd2ZnTiO6(GZTO):Bi3+, Mn4+，在 375 nm 激发下同时显示红色和蓝色发光。基于 Mn4+ 和 Bi3+ 离子的不同热灵敏度以及从 Bi3+ 到 Mn4+ 离子的能量转移，发光温度计显示出优异的热灵敏度（Sr = 2.4% K-1，Sa = 16.8%K-1）和广泛的温度测量范围 (313–473 K)。它们都优于报道最多的材料。此外，