Single-walled carbon nanotubes (SWCNTs) have attracted significant interest in many fields due to their remarkable electrical, optical, mechanical and thermal properties. In particular, the excellent properties of SWCNTs make them suitable for application in transparent and flexible electrodes [1-5]. Our objective was to study and characterize the SWCNTs composites, a necessary step for their applications. Thus, when SWCNTs are deposited on an insulating, transparent substrate, conductive and transparent films (T=80%-90%) in the visible-NIR range are achieved [6 - 9]. These thin films may be used as transparent electrodes in organic electronic devices because they have greater mechanical flexibility than indium tin oxide. They are particularly well suited as electrodes in organic solar cells as they increase their performance [10]. In many cases, flexibility is the most important parameter, i.e. in solar cells, for achieving good integration in the building architectural structure. The study of electrical and optical properties of SWCNTs thin films are useful for transparent and flexible network applications in different kind of devices including sensors, transistors and transparent electrodes.