Fabrication of pentacene organic field-effect transistors With polyimide gate dielectric layer

The organic tield effect transistors had been fabricated using the pentacene by vacuum evaporation as the active layer, the polyimide by spin coating as insulator layer, and aluminum by vacuum evaporation as gate, source and drain electrodes respectively. The field-effect mobility of 0.079 cm^2/V.s was tested at V.=70 V, and on/off radio up to 1.7×10^4.