High-mobility polymer space-charge-limited transistor with grid-induced crystallinity

The vertical mobility of a polymer film prepared on a textured substrate is enhanced from 10 (5) cm(2)/Vs to 10 (3) cm(2)/Vs by a slow drying process which is unattainable in planar substrate. Highly ordered structure is observed for polymer film treated with high-boiling-point solvent and slow solvent annealing. The enhanced vertical mobility enables the polymer space-charge-limited transistor (SCLT) capable of outputting current density as high as 100 mA/cm(2) while maintaining good current gain and on-off ratio. Such vertical transistor is able to drive high-power devices or mechanical actuator in large-area and flexible array. (C) 2010 Elsevier B. V. All rights reserved.