Volume 42, Issue 8, June 2016, Pages 10021-10029
Fabrication of Mg-doped ZnO nanofibers with high purities and tailored band gaps
The tailored doping levels towards the band gap tunability are one of the challenges to push forward the potential application of one-dimensional (1D)ZnOnanostructuresin the opto/electricnanodevices. In present work, we reported the exploration of Mg-doped ZnOnanofibersviaelectrospinningof polyvinylpyrrolidone (PVP), Zn(CH3COO)2 (ZnAc) and Mg(CH3COO)2 (MgAc), followed bycalcinationin air. The resultant products were systematically characterized byX-ray diffraction(XRD),scanning electron microscopy(SEM), high-resolution transmission electron microscope (HRTEM), andX-ray photoelectron spectroscopy(XPS). Theoptical 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.