Abstract Na2ZnP2O7: x mol. % Eu3+ phosphors with different dopant concentrations (x = 1, 2, 4, 6, 8) have been synthesized via high-temperature solid-state reaction. X-ray diffraction, scanning electron microscopy analyses and infrared (IR) spectroscopy were applied for detailed structural characterization. Under 393 nm excitation, the photoluminescence spectra displayed the 5D0 → 7FJ (J = 1, 2, 3, 4) intra-4f shell transitions related to Eu3+ ion. The radiative lifetime was estimated using the Ω2 and Ω4 Judd–Ofelt (J-O) intensity parameters. The highest luminescence intensity was achieved for an optimal europium concentration of 4 mol. %. The temperature-dependent photoluminescence and Commission Internationale de l’Eclairage chromaticity diagram were investigated. It was found that Eu3+-doped Na2ZnP2O7 exhibited good thermal stability and its emission intensity decreased slightly above room temperature. In addition, the color purity of this phosphor was about 99%. Na2ZnP2O7: Eu3+ phosphor can be considered as potential red phosphor for application in ultraviolet-pumped white light-emitting diodes.

中文翻译：

---

用于显示应用的具有高热稳定性的 Na2ZnP2O7 中掺杂的 Eu3+ 的光谱和 Judd-Ofelt 分析

摘要 Na2ZnP2O7：x mol。已经通过高温固相反应合成了具有不同掺杂浓度 (x = 1, 2, 4, 6, 8) 的 % Eu3+ 荧光粉。X 射线衍射、扫描电子显微镜分析和红外 (IR) 光谱被用于详细的结构表征。在 393 nm 激发下，光致发光光谱显示了与 Eu3+ 离子相关的 5D0 → 7FJ (J = 1, 2, 3, 4) 4f 壳层跃迁。使用 Ω2 和 Ω4 Judd–Ofelt (JO) 强度参数估计辐射寿命。最佳铕浓度为 4 mol 时，发光强度最高。%。研究了温度相关的光致发光和 Commission Internationale de l'Eclairage 色度图。发现Eu3+掺杂的Na2ZnP2O7表现出良好的热稳定性，其发射强度在室温以上略有下降。此外，该荧光粉的色纯度约为 99%。Na2ZnP2O7：Eu3+ 磷光体可被认为是用于紫外泵浦白光发光二极管的潜在红色磷光体。