Crystalline nanostructured Cu doped ZnO thin films grown at room temperature by pulsed laser deposition technique and their characterization

► Structural and optical properties of pure and Cu doped ZnO thin films. ► Crystalline thin films growth by PLD at room temperature without post annealing. ► Cu doping affect crystal structure, morphology, and optical properties of ZnO films. ► PL spectra revealed decrease in the band gap with the increase in Cu concentration.