Basf Se Corporation

Wolfgang Kalb

Beat Schmidhalter

Ulrich Berens

Frank Bienewald

Arno Stassen

A semiconducting layer comprising a non-polymeric quinoid heteroacene compound of the formula (I) wherein X stands for O, S or NR, each of R, R, R, R, R, R, R, R, Rbeing independently selected from hydrogen and an organic residue, or 2 or more thereof together forming one or more annealed rings, which may be substituted or unsubstituted, carbocyclic or helerocyclic, aromatic, quinoid or aliphatic, may be used e.g. for the manufacture of a diode, an organic field effect transistor, an organic thin film transistor, or a device containing a diode and/or an organic field effect transistor and/or organic thin film transistor. 

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Zurich, Switzerland

Wolfgang Kalb