N-channel field effect transistors with fullerene thin films and their application to a logic gate circuit

Abstract

N-channel field effect transistors (FETs) were fabricated with thin films of C 60 and Dy@C 82. A typical enhancement-type FET property was observed in C 60 FET above 220 K. The mobility of C 60 FET increased with increasing temperature. This fact suggests hopping transport as the conduction mechanism, with the activation energy of 0.29 eV. The Dy@C 82 FET was found to be a normally-on type FET, which has a property different from that for C 60 and C 70 FETs. A complementary metal oxide semiconductor (CMOS) logic gate circuit was first fabricated with C 60 and pentacene thin-film FETs.