In this research, Eu³⁺ activated and Dy³⁺-co-doped Y₂O₃ based phosphors have been synthesized by solid-state reaction method under open atmosphere. The host lattice is composed of 0.25 moles of Sc₂O₃ which is added to phosphor composition. Thus, Sc³⁺ substitution of Y³⁺ ions is implemented to form Y_1.40Sc_0.50O₃ host lattice. The thermal analysis (DTA/TG) have been carried out from 50 °C to 1400 °C for preliminary examination of thermal behavior of phosphors during heat treatments. After the heating process, the phase formations are characterized by X-ray diffraction resulted as Y₂O₃ single phase cubic structure. The effects of Eu³⁺ and Dy³⁺ dopant ions on the photoluminescence and phase formation properties of the hosts are investigated and determined as Dy³⁺-co-doped phoshor has the reduced excitation/emission intensities as well as decay lifetimes.

中文翻译：

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Eu3 +活化的Y1.50Sc0.50O3荧光粉的光致发光特性

在这项研究中，Eu ³⁺活化和Dy ³⁺共掺杂的Y ₂ O ₃基荧光粉已经通过固态反应方法在露天气氛下合成。主晶格由0.25摩尔的Sc ₂ O ₃组成，其被添加到磷光体组合物中。因此，实施Y ³⁺离子的Sc ³⁺取代以形成Y _1.40 Sc _0.50 O _3。宿主晶格。热分析（DTA / TG）已在50°C至1400°C的温度范围内进行，以初步检查荧光粉在热处理过程中的热行为。在加热过程之后，相形成通过X射线衍射表征为Y ₂ O ₃单相立方结构。研究并确定了Eu ³⁺和Dy ³⁺掺杂离子对主体的光致发光和相形成特性的影响，因为Dy ³⁺共掺杂的磷光体具有降低的激发/发射强度以及衰变寿命。