Study of Optical and Charge Transport Properties of Polypyrrole-ZnO Nanocomposite

摘要

Zinc oxide (ZnO) is a semiconductor with a wide band gap. In the present work zinc oxide nanoparticles (ZnO) were effectively produced by a sol-gel method by means of zinc acetate dehydrate, ethylene glycol mono methyl ether and ethanolamine being used as the precursor materials and Zinc oxide nanoparticles formed were thereby utilized to form composite with polypyrrole by in-situ chemical oxidative polymerization method in the further process. The composite obtained was characterized using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV-vis spectroscopy and dc conductivity. SEM micrograph give the average size of PPY-ZnO agglomerate is 100-700 nm and XRD results corroborate semi-crystalline nature of the nano-composites. The dc conduction mechanism has been analysed in the light of Mott's variable range hopping model and gives the evidence of 3D hopping in the samples.