Research on Study of some physical properties of conjugated polymers thin films used in solar cells applications, involving thin films preparation (by spin coating) and their characterization using various analysis techniques: optical properties (by spectrophotometry, ellipsometry), electrical properties (e.g. electrical resistivity, charge carrier mobility by charge extraction by linearly increasing voltage - CELIV), morphological properties (by atomic force microscopy, hydrophobicity determination), structural properties (by X-ray diffraction), etc.