eng Science and Education Publishing International Journal of Physics 2333-4576 2017-04-08 5 2 46 52 10.12691/ijp-5-2-3 IJP2017523 article Khalid. H. Razeg 1 Muthafar. F. AL-Hilli 2 Abed. A. Khalefa abedkhalefa65@gmail.com 2 Kadhim A. Aadim 2 Department of Physics, University of Tikrit, College of Education Department of Physics, University of Baghdad, College of Sciences This paper study (LixNi2-xO2) thin films with different value of x (x = 0.0, 0.15, 0.25, 0.35 and 0.45) prepared by pulse laser deposition technique (PLD) on a glass bases and annealed to (350°C). Using X-ray diffraction (XRD) and atomic force microscopy (AFM) to study the properties of synthetic and show that the (NiO) film has face centre cubic structure (fcc), while the (LixNi2-xO2) films of the ratio (0.15 to 0.45) has a hexagonal installation and grain size increase with the doping. Optical properties studied within the specified range of wavelengths (300-1100nm), it's found that the energy gap and transmittance decrease while absorbance and extinction coefficient increase with the doping. http://pubs.sciepub.com/ijp/5/2/3/ijp-5-2-3.pdf (Li_xNi_2-xO₂) thin film (PLD) Technique Optical Properties