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Effect of Mn Doping Concentration on Structural, Morphological and Optical Studies of ZnO Nano-particles

机译：锰掺杂浓度对ZnO纳米粒子结构，形貌和光学性质的影响

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摘要

We report the crystal structure, morphology and optical properties of the Zn1-xMnxO nanoparticles with nominal composition (x = 0.00, 0.05, 0.10, 0.15 & 0.20) were synthesized by sol-gel route. The crystal structure analysis was carried out by X-ray diffraction technique (XRD), morphology and particle size was investigated using Transition electron microscopy (TEM), Optical characterization was performed using UV-VIS technique. The XRD studies show that samples have wurtzite (hexagonal) crystal structure. In addition to this XRD results also indicate no extra impurity or secondary phases are observed. The lattice parameters a and c of Zn1-xMnxO nanoparticles increase with increasing Mn content which indicates that Mn2+ ions go to Zn2+ ions in the ZnO lattice. The atomic packing fraction (APF) increase of Mn doped ZnO nanoparticles with increasing Mn content. TEM microphotographs show that the pure and 10% Mn doped ZnO nanoparticles are in spherical shape and their average particle size of pure and 10% Mn doped ZnO nanoparticles are found in the range of 20-60 nm. The optical energy band gap decreases with increasing Mn concentration, it may be owing to Mn clustering.
机译：我们报告了通过溶胶-凝胶法合成了标称组成为（x = 0.00，0.05，0.10，0.15＆0.20）的Zn1-xMnxO纳米颗粒的晶体结构，形貌和光学性质。通过X射线衍射技术（XRD）进行晶体结构分析，使用过渡电子显微镜（TEM）研究形态和粒径，并使用UV-VIS技术进行光学表征。 XRD研究表明样品具有纤锌矿（六方）晶体结构。除此XRD结果外，还表明未观察到额外的杂质或第二相。 Zn1-xMnxO纳米粒子的晶格参数a和c随着Mn含量的增加而增加，这表明Mn 2 + 离子进入ZnO晶格中的Zn 2 + 离子。 Mn掺杂的ZnO纳米粒子的原子堆积分数（APF）随着Mn含量的增加而增加。 TEM显微照片显示，纯的和10％Mn掺杂的ZnO纳米颗粒呈球形，其纯的和10％Mn掺杂的ZnO纳米颗粒的平均粒径为20-60 nm。光学能带隙随着Mn浓度的增加而减小，这可能归因于Mn团簇。

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