Organic solid capacitor with conducting thin films as electrolyte by ion-beam-assisted deposition

Ion-beam-assisted deposition of organic materials has been proposed for obtaining high-quality thin films. As an application of these thin films, we have fabricated a solid electrolytic capacitor with organic conducting films prepared by means of evaporation of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) complex on porous oxidized aluminium (Al) plates under ion-beam irradiation. The quality of TCNQ complex films prepared by this method has been confirmed to be greatly improved compared with that obtained using the conventional evaporation method, giving high conductivity (5 S/cm2). The solid electrolytic capacitor also exhibits a large capacitance per unit area and a good frequency impedance response.