Optical and Magnetic Studies on ZnO Nanocrystals both Pure and Doped Prepared By Microwave Assisted Solvothermal Method

Nano-structured Zinc oxide is of high potential importance and has wide range of applications. We have made an attempt to investigate the effect of adding Mn 2+ and S 2separately as dopants on the structural, optical, and magnetic properties of nano-structured ZnO. A total of five samples pure and Mn 2+ and S 2added each with two different concentrations viz. 2.5 and 5.0 weight percentages were prepared by a simple, cost-effective, solvothermal method using a domestic microwave oven. The powder X-ray diffraction analysis indicates the hexagonal phase and average grain sizes ranging within 13 to 16 nm. The optical absorption study indicates blue shift on doping. The Photoluminescence spectra indicate violet and bluish green emissions for all the samples studied. The vibration sample magnetometric measurements indicate weak ferromagnetism for all the samples studied. KeywordsBand gap energy, Ferromagnetism, Nanoparticles, Solvothermal, XRD analyses.