The Er³⁺/Yb³⁺-codoped Y₂Mo₄O₁₅ microparticles, which possessed admirable optical thermometric and upconversion (UC) emission behaviors, were synthesized through the traditional sintering technology of the sol–gel route. Under near-infrared (NIR) light excitation, the obtained compounds showed the featured green and red UC emissions of Er³⁺ ions. The most intense luminescent intensity was detected when the Yb³⁺ ion content was 40 mol %. Through studying the temperature-dependent UC emission intensity ratio of the monitored green emissions, the optical thermometric properties of the resultant microparticles were investigated. The maximum sensor sensitivity of the studied microparticles with optimum doping concentration was approximately 0.00846 K^–1. Moreover, the achieved maximum sensor sensitivity was independent of the dopant content that was identical with the theoretical analysis by taking advantage of the Judd–Ofelt theory. Furthermore, a significant increment in the compounds’ temperature was achieved when the excitation pump power was verified in the range of 320–1040 mW. Ultimately, a green-emitting light-emitting diode device was developed with the aid of synthesized microparticles and a 940 nm NIR chip so as to identify their applicability for solid-state lighting. These aforementioned characteristics make the Er³⁺/Yb³⁺-codoped Y₂Mo₄O₁₅ microparticles not only suitable for noncontacting optical thermometry but also for solid-state lighting.

中文翻译：

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用于同时非接触式光学测温和固态照明的Er ³⁺ / Yb ^3+-掺杂的Y ₂ Mo ₄ O ₁₅微粒中的近红外光触发的可见上转换发射。

通过传统的溶胶-凝胶法烧结技术合成了具有Er ³⁺ / Yb ³⁺掺杂的Y ₂ Mo ₄ O ₁₅微粒，该微粒具有令人赞叹的光学测温和上转换（UC）发射性能。在近红外（NIR）光激发下，所得化合物显示出Er ³⁺离子的绿色和红色UC发射特征。当Yb ³⁺时检测到最强的发光强度离子含量为40摩尔％。通过研究所监测的绿色排放物的随温度变化的UC排放强度比，研究了所得微粒的光学测温特性。在最佳掺杂浓度下，所研究的微粒的最大传感器灵敏度约为0.00846 K ^–1。此外，通过利用Judd-Ofelt理论，获得的最大传感器灵敏度与掺杂剂含量无关，而掺杂剂含量与理论分析相同。此外，当在320–1040 mW范围内验证了激励泵功率时，化合物的温度得到了显着提高。最终，借助合成的微粒和940 nm NIR芯片开发了一种绿色发光二极管器件，以确定其在固态照明中的适用性。这些前述特性使得掺有Er ³⁺ / Yb ^3+的Y ₂ Mo ₄ O ₁₅微粒不仅适用于非接触光学测温法，而且适用于固态照明。