High performance organic semiconducting thin films: Ink jet printed polythiophene [rr-P3HT]

The piezoelectric ink jet (IJ) printing of an organic semiconducting ink, as applied to the fabrication of a thin film diode, has been demonstrated. IJ printed regioregular poly (3-hexylthiophene-2,5-diyl) [rr-P3HT] semiconducting films were directly patterned on to gold thin film contact surfaces. The resulting metal semiconductor metal diode exhibited low leakage current and a good forward reverse current ratio. IJ printing of the P3HT as directly patterned thin films represents a significant step toward the realisation of cheap, large area, organic microelectronic devices and transistor active matrix backplanes. (C) 2001 Elsevier Science B.V. All rights reserved.