Thomas Neenu Mary, Anila E I
Department of Physics, Morning Star Home Science College, Angamaly, Kerala, 683573, India.
Optoelectronic and Nanomaterials' Research Lab, Department of Physics, Union Christian College, Aluva, Kerala, 683102, India.
J Fluoresc. 2024 May;34(3):1161-1169. doi: 10.1007/s10895-023-03351-8. Epub 2023 Jul 25.
The current study involves the synthesis and characterisation of europium doped strontium aluminate nanophosphors using the solid-state reaction method with varying concentrations of europium. The existence of the SrAlO phase in all samples was verified using X-ray diffraction and FTIR analysis. The lattice parameters as well as phase fractions were determined using Rietveld refinement. Surface morphology was studied using field emission scanning electron microscope. Using the Tauc plot method acquired from the diffuse reflectance spectra, the band gaps of the samples were determined and it was found that the doped samples possess lower band gaps compared to the host. Our findings demonstrate that these nanophosphors exhibiting bright orange-red emission under UV excitation with quantum efficiency 70.68%, can be applied for display and fluorescence imaging.
本研究采用固态反应法，在不同铕浓度下合成并表征了铕掺杂的铝酸锶纳米磷光体。通过X射线衍射和傅里叶变换红外光谱分析验证了所有样品中SrAlO相的存在。使用Rietveld精修法确定了晶格参数和相分数。用场发射扫描电子显微镜研究了表面形态。利用从漫反射光谱获得的Tauc图方法测定了样品的带隙，发现掺杂样品的带隙比主体材料低。我们的研究结果表明，这些纳米磷光体在紫外激发下呈现亮橙红色发射，量子效率为70.68%，可应用于显示和荧光成像。
