Structural and optical properties of CdO and CdO0.99Cu0.01 thin films prepared by pulsed laser deposition technique

Structural and optical properties of CdO and CdO0.99Cu0.01 thinfilms were prepared in this work. Cadmium Oxide (CdO) andCdO0.99Cu0.01semiconducting films are deposited on glass substratesby using pulsed laser deposition method (PLD) using SHG with QswitchedNd:YAG pulsed laser operation at 1064nm in 6x10-2 mbarvacuum condition and frequency 6 Hz. CdO and CdO0.99Cu0.01 thinfilms annealed at 550 C̊ for 12 min. The crystalline structure wasstudied by X-ray diffraction (XRD) method and atomic forcemicroscope (AFM). It shows that the films are polycrystalline.Optical properties of thin films were analyzed. The direct band gapenergy of CdO and CdO0.99Cu0.01 thin films were determined from(αhυ)1/2 vs. photon energy curve and found to be 2.3 eV for CdO thinfilm, comparing with that the CdO0.99Cu0.01film which found to be2.2eV. The electrical measurements shows that the conductivity andmobility of the charge carriers increase when Cu doped CdO.