The Growth and Optical Properties of Al-Doped ZnO Nanofibers Using PVP Nanofibers as Templates by Atom Layer Deposition

Different doping concentration Al-doped ZnO nanofibers were synthesized by Atom Layer Deposition (ALD) using PVP fibers as template. The influence of Al doping concentration on the structure and optical properties of nanofibers was investigated. The samples were characterized by means of X-ray diffraction spectra, field emission scanning electron microscopy (FESEM). After doping, the morphologies were not changed, only the diameters of Al-doped ZnO nanofibers became larger. Compared with undoped ZnO, the intensity of diffractive peaks of Al-doped ZnO nanofibers became weak with the increasing of the doping concentration due to stress generation in the crystallization process. In raman spectra, Al2O3 peak related peaks were also observed. In addition, the intensity of UV emission decreased with increasing Al doping concentration and had a red shift.