Effect of Mn2+ addition on the electrical properties of ZnO-ZnS nanocomposites

By M. Vimalan and C. K. Mahadevan


Abstract

ZnSxO1-x: Mn2+ (x = 0.0, 0.2, 0.4, 0.5, 0.6, 0.8 and 1.0) nanocomposites were successfully prepared by the microwave assisted solvothermal method using a domestic microwave oven. The prepared samples were annealed at 200oC for 1 hr to improve the ordering.  Grain sizes and lattice parameters were determined by carrying out X-ray powder diffraction measurements. Scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDS) show the morphology and elemental analysis of the as-synthesized ZnSxO1-x: Mn2+ nanocrystals. AC and DC electrical measurements were carried out on palletised samples at various temperatures ranging from 40-150oC.  Results of the present study reveal that the space charge contribution plays a significant role in the charge transport process and polarizability in all the seven nanocrystals studied.

 

Key Words : Composites; semiconductors; structural materials; X-ray diffraction; electrical properties.

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