The irradiation of a polycarbonate (PC) matrix with 28Si+ ions has been performed by selecting three different energies: 0.5áMeV, 1.0áMeV and 2.0áMeV. The comparative study of the modifications induced in the polymer as a function of the incident ion beam energy has been carried out in the range of fluences between 5áÎá1013áionsácm−2 and 1áÎá1015áionsácm−2. The changes induced in the structure of the matrix towards the production of conducting plastics for optoelectronics devices have been evaluated by Raman and Photoluminescence spectroscopy. The carbonization process of the polymer generates a network made of sp2-bonded graphitic clusters embedded in a sp3-bonded matrix. The amount of nanocrystalline-graphite with respect to amorphous-carbon increases as ion energy and fluence increase, in accordance with the increase of the sp2-order arrangement. With 0.5áMeV the modification …