Fabrication and Evaluation of Rectifying Characteristics of Polyvinyl Alcohol (PVA) doped with Lithium Chloride (LiCl) Schottky Diode Laith M. Rasheed Pollution and Environmental Dept. College of Science Al-Muthanna University / Iraq Abdulameer K. Farhood* Physics Dept. College of Science Al-Muthanna University / Iraq *e-mail : [email protected] Keywords: PVA polymer , Schottky diode, I-V characteristics, Cu/PVA/AL, barrier height, optical properties . Abstract: In this study thin film of polyvinyl alcohol (PVA) doped with Lithium Chloride (LiCl) with percentage of (0.2 wt %) prepared as Schottky diode with copper (Cu) and Aluminum (AL) electrodes have been studied. The current-voltage characteristics of the Cu/PVA/AL structure are investigated and can be explained in terms of the charge transport mechanism operating in the PVA polymer film in the different voltage regions and different temperatures (303-343K). The ideality factor (n) , series resistance (Rs), saturation current( Io), barrier height (fBP) electron affinity ( ) and ionization potential (Is) have been measured and they found to be ( 3.2, 2x1011 ohm , 1.3x10-11 amp, 0.34 eV, 3.04 eV and 4.4 eV ) respectively . From the studied optical properties, the optical energy gap was found to be (1.53 eV). Also from the temperature dependence of current-voltage characteristics, the activation energy is found to be (0.67 eV).