Abstract In this work we present for the first time the effective modulation of spectroscopic parameters of Ni2+ emission based luminescence nanothermometer (LNT). Emission of Ni2+ ions, highly susceptible to the local symmetry variations, can be easily modulated by the change of the crystal field strength of matrix. In this approach we proposed four ATiO3 perovskite nanocrystalline matrixes, namely SrTiO3, CaTiO3, MgTiO3, BaTiO3, in which the change of the crystal field strength is induced by the Ti4+ - O2− distance elongation. With the increase of this distance we achieved 500 nm spectral shift of Ni2+ emission maximum from 1200 nm for SrTiO3: Ni2+ up to 1700 nm for MgTiO3: Ni2+. Furthermore, it was found that the host material strongly influenced thermal quenching of Ni2+ emission intensity, which had high impact on the value of relative sensitivity (SR). The highest rate of thermal quenching was observed for MgTiO3: Ni2+ nanocrystals with SR>1.4%/K, while in physiological temperature range highest SR was obtained for CaTiO3: Ni2+ (1.4%/K

中文翻译：

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主体材料对 NIR II 和 NIR III 发射 Ni2+ 基 ATiO3 发光温度计的影响：Ni2+（A = Sr、Ca、Mg、Ba）纳米晶体

摘要 在这项工作中，我们首次提出了基于 Ni2+ 发射的发光纳米温度计 (LNT) 光谱参数的有效调制。Ni2+ 离子的发射极易受局部对称性变化的影响，可以很容易地通过基体晶体场强的变化进行调制。在这种方法中，我们提出了四种 ATiO3 钙钛矿纳米晶基质，即 SrTiO3、CaTiO3、MgTiO3、BaTiO3，其中晶体场强的变化是由 Ti4+-O2- 距离伸长引起的。随着该距离的增加，我们实现了 Ni2+ 发射最大值的 500 nm 光谱偏移，从 SrTiO3: Ni2+ 的 1200 nm 到 MgTiO3: Ni2+ 的 1700 nm。此外，发现主体材料强烈影响 Ni2+ 发射强度的热猝灭，这对相对灵敏度 (SR) 的值有很大影响。MgTiO3:Ni2+ 纳米晶体的热淬灭率最高，SR>1.4%/K，而在生理温度范围内，CaTiO3:Ni2+ (1.4%/K