High-performance dinaphtho-thieno-thiophene single crystal field-effect transistors.

We fabricated high-performance single crystal organic field-effect transistors (SC-OFETs) based on dinaphtho[2,3-b:2^′,3^′-f]thieno[3,2-b]-thiophene (DNTT). Among various device geometries and contact types, best performance is obtained for a lamination-type SC-OFET composed of a Cytop-treated SiO₂ gate dielectric and top-contact gold/tetrathiafulvalene-tetracyanoquinodimethane electrodes, which results in hysteresis-free device characteristics with optimum mobility of 8.3 cm²/V s and an on/off ratio of >10⁸. The achieved performance is promising for use of the air-stable DNTT in future studies of intrinsic properties of molecular crystals. [ABSTRACT FROM AUTHOR]