Abstract
Copper substituted ZnO nanopowders have been prepared by co‐precipitation method to investigate the effect of Cu substitution on the electrical and optical properties of ZnO nanoparticles. FT‐IR spectra show an absorption band near 480 cm−1 corresponding to the stretching mode of Zn‐O bond. X‐ray powder studies confirmed the formation of hexagonal wurtzite structure of ZnO for all the samples. The lattice parameter shows a decreasing behavior with increasing copper concentration in the ZnO lattice. The electrical resistivity value for all the samples is almost constant, but it shows a decreasing behavior with increasing temperature. The band gap energy values follow a decreasing behavior with the increasing copper concentration.
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