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Structural and optical properties of Mg modified ZnO nanoparticles: An x-ray peak broadening analysis
Physica E: Low-dimensional Systems and Nanostructures ( IF 2.9 ) Pub Date : 2020-07-26 , DOI: 10.1016/j.physe.2020.114381
Gunjan Srinet , Subhash Sharma , Manish Kumar , Avneesh Anshul

The structural, microstructural, and optical properties of Mg-doped ZnO nanoparticles prepared via. thermal decomposition route. The Rietveld analysis was executed for prepared sample, which revealed that the hexagonal wurtzite structure for all samples along with changes in lattice parameters and bond length. The various relevant parameters, such as strain, stress, and energy density, are analyzed using different improved forms of W-H equations via. a complete Willamson-Hall (W-H) method. Scanning electron microscopy (SEM) analysis resultant that the synthesized nanoparticles (NP's) are nearly spherical for Zn1-xMgxO, up to x = 0.04, and transform into a rectangular shape for x = 0.10. UV–Visible spectroscopy revealed an observation of fundamental absorption peak around 375 nm, which further shifted towards the higher wavelength, recommended the blue shift in the bandgap energy. The photoluminescence (PL) studies show a green emission band at 550 nm, demonstrating the occurrence of oxygen vacancy defects in the lattice of ZnO.



中文翻译:

Mg修饰的ZnO纳米颗粒的结构和光学性质:X射线峰展宽分析

通过制备的Mg掺杂的ZnO纳米粒子的结构,微观结构和光学性质热分解路线。对制备的样品进行Rietveld分析,结果表明所有样品的六方纤锌矿结构以及晶格参数和键长的变化。使用WH方程的不同改进形式来分析各种相关参数,例如应变,应力和能量密度完整的Willamson-Hall(WH)方法。扫描电子显微镜(SEM)分析结果表明,对于Zn 1-x Mg x,合成的纳米颗粒(NP's)接近球形O,直到x = 0.04,并转换为x = 0.10的矩形。紫外可见光谱仪观察到在375 nm附近的基本吸收峰,该峰进一步移向更高的波长,建议带隙能量发生蓝移。光致发光(PL)研究显示了550 nm处的绿色发射带,表明ZnO晶格中存在氧空位缺陷。

更新日期:2020-08-04
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