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New star-shaped derivatives of 10,15-dihydro-5H-diindolo[3,2-a:3′,2′-c]carbazole (triindole) with reactive functional groups are synthesized. Triindole monomers were found to have similar profiles of absorption and fluorescence spectra due to the presence of the same chromophore. The ionization potentials of the monomers are found to be comparable (5.37–5.53 eV). Hole drift mobilities of the amorphous layers of oxetane and vinyl ether molecularly dispersed in bisphenol Z polycarbonate (50%) exceed 10−5cm2/Vs at high electric fields. Cationic photocross-linking of triindole containing oxirane, oxetane and vinyl ether initiated with diphenyliodoniun tetrafluorborate is carried out.

The properties of the pyrenyl-substituted fluorene and carbazole compounds exhibiting charge carrier transport properties are reported. Cyclovoltammetric experiments revealed the electrochemical stability of the fluorene compounds. In contrast to the fluorene derivatives, the carbazole compounds showed nonreversible oxidations in the CV experiments. The pyrene-substituted fluorene and carbazole derivatives showed capability of transporting holes as characterized by xerographic time of flight technique. Ionization potential values measured by electron photoemission spectroscopy were found to be in the range of 5.70 eV – 5.93 eV.

We have found that the structures based on ITO/tri(9-hexylcarbazol-3-yl)amine/Ca/Al fabricated by means of vacuum deposition generate acoustic oscillations when pulse voltage is applied. Impedance spectroscopy study indicates the presence of significant inductive response, which is the result of significant energy barriers at the semiconductor-metal interface. We assume that a very heterogeneous spatial distribution of the electric field at the organic/metal interface and the noncoplanarity of the molecules cause the electrostriction effect in the structures.