To explore the silicate lattice-based nanophosphors, a series of Eu3+-doped Z2Si3O8 (Z = Mg, Ca and Sr) materials were prepared by sol–gel procedure. The metal nitrates and silica powder were used as precursor components for the synthesis of these luminescent materials. Photoluminescence (PL) emission spectra, powder X-ray diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) spectroscopic techniques were applied for the characterization of the fabricated materials. Three peaks were observed at 589, 613 and 650–652 nm corresponding to 5D0 → 7F1-3 transition in PL emission spectra. Upon 395 nm excitation and at 0.03 mol Eu3+, these nanophosphors displayed optimum photoluminescence with the most intense peak analogous to 5D0 → 7F2 transition of dopant ion. The as-prepared phosphor materials were re-heated at 1050 and 1150 °C to observe the consequences of higher temperatures on the emission intensity and crystal lattice. XRD analysis confirmed that all the synthesized materials were of crystalline nature, and the crystallinity was observed to be improved by increasing the temperature. In the FTIR spectrum, peaks at 483 and 610 cm−1 proved the existence of SiO4 group in Ca2Si3O8, and the peak centered at 417 cm−1 confirmed the presence of MgO6 octahedral in Mg2Si3O8 materials. TEM images were used to determine the particle size (13–35 nm) and to study the three-dimensional structure of nanophosphor materials. The experimental studies indicate that these materials may be promising as red-emitting nanophosphors for white light-emitting diodes.

中文翻译：

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用于显示应用的三价铕掺杂 Z2Si3O8（Z = Mg、Ca 和 Sr）纳米磷光体的合成和光谱研究

为了探索基于硅酸盐晶格的纳米磷光体，通过溶胶-凝胶程序制备了一系列 Eu3+ 掺杂的 Z2Si3O8（Z = Mg、Ca 和 Sr）材料。金属硝酸盐和二氧化硅粉末被用作合成这些发光材料的前体组分。应用光致发光 (PL) 发射光谱、粉末 X 射线衍射 (PXRD)、能量色散 X 射线光谱 (EDS)、傅里叶变换红外光谱 (FTIR) 和透射电子显微镜 (TEM) 光谱技术来表征制作材料。在 589、613 和 650–652 nm 处观察到三个峰，对应于 PL 发射光谱中的 5D0 → 7F1-3 跃迁。在 395 nm 激发和 0.03 mol Eu3+ 下，这些纳米磷光体显示出最佳的光致发光，峰值最强，类似于掺杂离子的 5D0 → 7F2 跃迁。将制备的荧光粉材料在 1050 和 1150 °C 下重新加热，以观察较高温度对发射强度和晶格的影响。XRD分析证实所有合成材料均具有结晶性质，观察到随着温度的升高结晶度有所提高。在 FTIR 光谱中，483 和 610 cm-1 处的峰证明 Ca2Si3O8 中存在 SiO4 基团，417 cm-1 处的峰证实 Mg2Si3O8 材料中存在 MgO6 八面体。TEM 图像用于确定粒径 (13-35 nm) 并研究纳米磷光体材料的三维结构。