CONDUCTIVITY-TYPE ANISOTROPY IN MOLECULAR-SOLIDS

Thin polycrystalline films of perylenetetracarboxylic dianyhydride (PT CDA), an organic molecular solid, exhibits substantial anisotropies in its electronic transport properties. Only electrons transport in the directions along molecular planes, while mainly holes transport in the direction normal to molecular planes. A series of measurements on bot h field effect transistors with PTCDA active layers and light emitting diodes with PTCDA transport layers documents the anisotropy seen in t he electronic transport in thin films of PTCDA. (C) 1997 American Inst itute of Physics.