Y₂O₃:Tm³⁺ and Li⁺ co‐doped Y₂O₃:Tm³⁺ nanopowders were synthesized using the solution combustion method for possible application in ultraviolet (UV) light dosimetry. X‐ray diffraction revealed the crystallite sizes to be in the range 21–44 nm and 30–121 nm using the Scherrer equation and the W‐H plot relationship, respectively. Field emission scanning electron microscopy confirmed that, after co‐doping with 4 mol% concentration of Li⁺, the particles were spherical in nature with an average size of ~30 nm. Fourier transformed infrared spectroscopy results showed bands at wavenumbers of 556, 1499, 1704, 2342, 2358, 2973, 3433, and 3610 cm⁻¹ that corresponded to the stretching and bending vibrations of Y–O, C=O and O–H. Thermoluminescence (TL) glow peaks for Y₂O₃:Tm³⁺ nanophosphors observed at 399 and 590 K were attributed to oxygen defects caused using UV irradiation. These oxygen defects firstly resulted in an increased prominent peak TL intensity for up to 270 min of irradiation and then a decrease. This was attributed to the presence of oxygen defect clusters that caused a reduction in recombination centres. The Li⁺ co‐doped sample showed peaks at 356, 430, and 583 K and its intensity sublinearly increased up to 90 min and then thereafter decreased. The TL trapping parameters were calculated using computerized glow curve deconvolution methods. The Li⁺ co‐doped sample exhibited less fading and high trap density under the UV radiation.

中文翻译：

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Li +离子对Y2 O3：Tm3 +纳米磷光体的表面形态和热致发光性能的作用。

使用溶液燃烧方法合成了Y ₂ O ₃：Tm ³⁺和Li ⁺共掺杂的Y ₂ O ₃：Tm ³⁺纳米粉，可能用于紫外（UV）剂量学。X射线衍射表明，使用Scherrer方程和W-H图关系，微晶尺寸分别在21-44 nm和30-121 nm范围内。场发射扫描电子显微镜证实，在共掺杂4 mol％浓度的Li ^+后，，该颗粒本质上是球形的，平均尺寸约为30 nm。傅立叶变换红外光谱结果表明，在556、1499、1704、2342、2358、2973、3433和3610 cm ^-1处的波带对应于Y–O，C = O和O–H的拉伸和弯曲振动。在399和590 K处观察到的Y ₂ O ₃：Tm ³⁺纳米磷光体的热致发光（TL）辉光峰归因于使用UV辐射引起的氧缺陷。这些氧缺陷首先导致最高的峰值TL强度在长达270分钟的辐照下增加，然后降低。这归因于氧缺陷簇的存在，其导致了重组中心的减少。李⁺共掺杂样品在356、430和583 K处出现峰值，其强度在90分钟内呈亚线性增加，然后降低。使用计算机辉光曲线反卷积方法计算了TL捕获参数。Li ⁺共掺杂样品在紫外辐射下显示出较少的褪色和较高的陷阱密度。