P-21: n-type Organic Thin Film Transistors with High Operational Stability

n-type organic thin film transistors (OTFTs) with high operational stability was demonstrated. The operational stability of N,N`-ditridecylperylene-3,4,9,10-tetracarboxylic diimide (PTCDI-C13)-based OTFTs was improved by engineering organic semiconductor-gate insulator interface with hydrophobic polymers. Under high gate bias stress (equivalent to the electric field of 3MV/cm) for two hours, OTFTs with hydrophobic polymers showed small threshold voltage shift around 2 V. Moreover, the electron mobility was improved from 0.038 to 0.14–0.15 cm 2 /Vs with hydrophobic polymers.