Fabrication of Mg-doped ZnO nanofibers with high purities and tailored band gaps

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• 作者：Weixuan Zeng^a ; ^b ; Xianfeng Yang^a ; ^{yangxf05@mails.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Minghui Shang^b ; Xiewen Xu^a ; Weiyou Yang^b ; Huilin Hou^b ; ^{houhuilin86@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Mg-doped ZnO nanofibers ; Electrospinning ; High purities ; Tailored band gaps
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：42
• 期：8
• 页码：10021-10029
• 全文大小：3085 K

文摘

The tailored doping levels towards the band gap tunability are one of the challenges to push forward the potential application of one-dimensional (1D) ZnO nanostructures in the opto/electric nanodevices. In present work, we reported the exploration of Mg-doped ZnO nanofibers via electrospinning of polyvinylpyrrolidone (PVP), Zn(CH₃COO)₂ (ZnAc) and Mg(CH₃COO)₂ (MgAc), followed by calcination in air. The resultant products were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscope (HRTEM), and X-ray photoelectron spectroscopy (XPS). The optical measurements (UV–vis) of the Mg-doped ZnO nanofibers suggested that the optical band gaps of the ZnO nanofibers could be tuned from 3.33 to 3.40 eV as a function of the Mg doing levels. This tunability of the band gap of ZnO nanofibers with an intentional impurity could eventually be useful for optoelectronic applications.