PENTACENE-BASED ORGANIC THIN-FILM TRANSISTORS

Organic thin-film transistors using the fused-ring polycyclic aromatic hydrocarbon pentacene as the active electronic material have shown mo bility as large as 0.7 cm(2)/V-s and on/off current ratio larger than 10(8); both values are comparable to hydrogenated amorphous silicon de vices. On the other hand, these and most other organic TFT's have an u ndesirably large subthreshold slope. We show here that the large subth reshold slope typically observed is not an intrinsic property of the o rganic semiconducting material and that devices with subthreshold slop e similar to amorphous silicon devices are possible.