Abstract We investigated the structural and luminescent properties of Eu3+-doped CaHfO3, which was synthesized using the solid-state reaction method. The crystal structures of the samples were analyzed by applying the Rietveld refinement technique on their X-ray diffraction patterns. Because of cation vacancies and/or interstitial oxygens, the unit-cell volumes of the samples increased, and the local lattice distortions were alleviated when the Eu3+ concentration increased. For near-ultraviolet photoexcitation, the emission spectra of our samples showed a series of narrow bands, which were assigned to the energy transitions of 5D0 → 7FJ (J = 0, 1, 2, 3, and 4) in the Eu3+ ions. The luminescence behaviors of the samples were evaluated using Judd–Ofelt intensity parameters, which provided useful information regarding the local structure around the Eu3+ ions.

中文翻译：

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铕离子掺杂 CaHfO3 的结构和发光特性

摘要 我们研究了使用固态反应法合成的 Eu3+ 掺杂 CaHfO3 的结构和发光特性。通过对样品的 X 射线衍射图应用 Rietveld 精修技术来分析样品的晶体结构。由于阳离子空位和/或间隙氧，样品的晶胞体积增加，当 Eu3+ 浓度增加时，局部晶格畸变得到缓解。对于近紫外光激发，我们样品的发射光谱显示出一系列窄带，它们被指定为 Eu3+ 离子中 5D0 → 7FJ（J = 0、1、2、3 和 4）的能量跃迁。使用 Judd-Ofelt 强度参数评估样品的发光行为，