Abstract In this paper we report the results of investigations on optical properties in the short-wavelength spectral range of thulium doped Y2O3 nanocrystals and PMMA-based polymer nanocomposites doped with them. The set of thulium doped Y2O3 nanopowders differing in dopant concentrations was examined with respect of structural features and UV-blue emission properties. In particular, the concentration-dependent luminescence spectra and fluorescence dynamics profiles have been measured, enabling identification of emitting levels, determination of fluorescence lifetimes as well as discussion and analysis of possible fluorescence quenching mechanisms. This, in turn, enabled optimization of the dopant concentration and manufacturing PMMA polymer composites doped with Tm3+:Y2O3 nanopowders, luminescent properties of which have been investigated and compared with those of original nanocrystals.

中文翻译：

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Tm3+:Y2O3纳米晶体和PMMA基复合材料的紫外蓝光发光特性

摘要 在本文中，我们报告了对掺铥的 Y2O3 纳米晶体和掺有它们的 PMMA 基聚合物纳米复合材料在短波长光谱范围内的光学特性的研究结果。研究了掺杂浓度不同的一组铥掺杂 Y2O3 纳米粉末的结构特征和 UV-蓝色发射特性。特别是，测量了浓度依赖性发光光谱和荧光动力学曲线，从而能够识别发射水平、确定荧光寿命以及讨论和分析可能的荧光猝灭机制。这反过来又可以优化掺杂剂浓度并制造掺杂 Tm3+:Y2O3 纳米粉末的 PMMA 聚合物复合材料，