A Comparative Study of Structural, Optical and Electrical Properties of Fe-ZnO Nanoparticles Synthesized by Precipitation and Microwave Method for Photovoltaic Applications
A Comparative Study of Structural, Optical and Electrical Properties of Fe-ZnO Nanoparticles Synthesized by Precipitation and Microwave Method for Photovoltaic Applications
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DOI：
10.21926/jept.2103035
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发表时间：
2021-05
期刊：
影响因子：
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通讯作者：
Ganga R. Neupane;A. Kaphle;D. Mcllroy;E. Echeverria;P. Sankaran;P. Hari
中科院分区：
文献类型：
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作者：
Ganga R. Neupane;A. Kaphle;D. Mcllroy;E. Echeverria;P. Sankaran;P. Hari
铁掺杂的ZnO（Fe-ZnO）纳米颗粒使用两种技术合成，这两种技术是经济的并且可扩展的，以产生用于促进太阳能电池的吸收层中的下转换的纳米颗粒的可调性质。为了评估两种沉积方法制备的Fe-ZnO纳米颗粒的适用性，我们提出了一个比较的光学，电学和结构特性的Fe-ZnO使用几种实验技术。使用透射电子显微镜和X-射线衍射光谱（XRD）与Rietveld分析提取信息的组成变化与Fe掺杂的结构特性进行了分析。通过X射线光电子能谱（XPS）分析纳米颗粒的化学组成。利用光致发光和紫外-可见吸收光谱研究了纳米颗粒的光学性质。此外，还进行了荧光寿命测量，以研究寿命指数衰减的变化。利用阻抗谱分析了Fe-ZnO的电输运特性。我们的研究表明，在微波方法中，乙醇作为溶剂将产生更小的纳米粒子的大小高达11 nm。相比之下，沉淀法产生的第二相的Fe 2 O3超过5%的掺杂。此外，我们的研究表明，所得的Fe-ZnO纳米粒子的光学和电学性质取决于所使用的颗粒尺寸和合成技术。这些新的结果提供了洞察的作用，溶剂在制造Fe-ZnO纳米粒子的沉淀和微波方法的光伏和其他应用。
Iron doped ZnO (Fe-ZnO) nanoparticles were synthesized using two techniques that are economical as well as scalable to yield tunable properties of nanoparticles for facilitating down conversion in an absorbing layer of a solar cell. To evaluate the suitability of Fe-ZnO nanoparticles prepared by two deposition methods, we present a comparison of optical, electrical, and structural properties of Fe-ZnO using several experimental techniques. Structural properties were analyzed using transmission electron microscopy and x-ray diffraction spectroscopy (XRD) with Rietveld analysis for extracting information on compositional variations with Fe doping. The chemical composition of nanoparticles was analyzed through X-ray photoelectron spectroscopy (XPS). The optical properties of nanoparticles were studied using photoluminescence and UV-Vis absorption spectroscopy. In addition, fluorescence lifetime measurement was also performed to study the changes in an exponential decay of lifetimes. The electrical transport properties of Fe-ZnO were analyzed by impedance spectroscopy. Our studies indicate that ethanol as a solvent in a microwave method would produce smaller nanoparticles up to the size of 11 nm. In contrast, the precipitation method produces secondary phases of Fe2O3 beyond 5% doping. In addition, our studies show that the optical and electrical properties of resulting Fe-ZnO nanoparticles depend on the particle sizes and the synthesis techniques used. These new results provide insight into the role of solvents in fabricating Fe-ZnO nanoparticles by precipitation and microwave methods for photovoltaic and other applications.