In this work, Schiff base ligand (L) has been synthesized by condensation reaction of N-amino quinoline-2-one with 4-chlorobenzaldehyede in ethanol, for 5 hours. The synthesized ligand was characterized using (13C,1H NMR), (U.V-Vis), X-ray diffraction (XRD), (FT-IR), (C.H.N) elemental analysis, atomic force microscope (AFM) and melting point. The chromium complex was obtained by (2:1) (L: M) molar ratio and then characterized by FT-IR, UV-Vis, molar conductivity, magnetic susceptibility measurements, AFM, XRD and flame atomic absorption technique (FAA). The results confirmed an octahedral geometry of chrome ion (III). Drop casting techniques was used to prepare nano-thin films of the synthesized compounds. The aim of this study was to fabricate solar cells using the prepared nano-thin films. To achieve, the morphological, structural and optical properties of the nano-thin films were studied, and then they were precipitated on the silicon slides. The fabricated solar cells showed a high efficiency promising to be used for improving silicon solar cells.