Abstract
In this thesis, we have investigated the realization of small molecule organic thin-film transistor based on blend of fullerene (C60) and P-BTDT:OP-BTDT via solution process. As far as the electrical characteristic of p- and n-type small molecular materials mixed as semiconductor layer is concerned, these devices show the ambipolar charge carrier transport. With optimized the weight ratio of (P-BTDT:OP-BTDT)/C60, the phase images of active layer employing atomic force microscopy show a fine network and filed-effect mobility for hole and electron are measured as 0.0297 and 0.0243 cm2/Vs, respectively. Such a balanced of hole and electron makes them potential candidates for the organic complementary circuits and inverter circuits of these ambipolar TFTs are also demonstrated.