Abstract: We have fabricated pentacene organic thin-film field-effect transistors (TFTs) by all-evaporation method. In this method, the active layer and the dielectric layer were fabricated by evaporation using pentacene a nd the poly(methylmethacrylate) (PMMA), respectively. The devices have a low operating voltage ranges and a higher mobility. The device operating mechanism has been discussed.

Key words: organic thin-film field-effect transistors, pentacene, poly(methylmethacrylate)