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Effect of CdS nanocrystals on the photoluminescence of Eu3+-doped silicophosphate sol gel glass

机译:CdS纳米晶体对Eu 3 + 掺杂硅磷酸盐溶胶凝胶玻璃光致发光的影响

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In this work, we investigate the effect of co-doping with CdS nanoparticles on the photoluminescence properties of Eu3+ doped silicophosphate glass prepared via the sol gel method. Infrared spectroscopy (FTIR) revealed the insertion of phosphorus within the silicate network. XRD and TEM analyses revealed the presence of CdS nanoparticles dispersed in the glass matrix. Based on the optical study and the effective mass theory for spherical quantum dots, it was found that CdS nanocrystals have a gap of nearly 3.53 eV and a size of 2.42 nm. The enhancement of Eu3+ emission induced by CdS nanocrystals and thermal annealing was assigned to either an energy transfer via defect states or structural alteration of the glass network around the rare earth ions.
机译:在这项工作中,我们研究了用CdS纳米粒子共掺杂对通过 制备的Eu 3 + 掺杂的Eu 3 + 掺杂的硅磷酸盐玻璃的光致发光性能的影响。溶胶凝胶法。红外光谱(FTIR)显示磷在硅酸盐网络中的插入。 XRD和TEM分析表明CdS纳米颗粒分散在玻璃基质中。基于光学研究和球形量子点的有效质量理论,发现CdS纳米晶体的间隙接近3.53 eV,尺寸为2.42 nm。 CdS纳米晶体和热退火引起的Eu 3 + 发射的增强被归因于通过缺陷状态的能量转移或结构的改变。玻璃网络周围的稀土离子。

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