Abstract: Stable conductive polymer compositions which do not contain metal ions.The compositions comprise at least one inherently conductive polymer or copolymer chosen from polythiophenes, polypyrroles, polyacetylenes, polyphenylenes, polythiophene copolymers, polypyrrole copolymers and their water-soluble derivatives, characterized in that the inherently conductive polymer is doped with an oxidizing compound chosen from the compounds of formulae:R--NO and R--NO.sub.2,in which R is chosen from the groups HSO.sub.4, R.sup.1 SO.sub.3 and (R.sup.1 SO.sub.2).sub.2 N,in which R.sub.1 ?sic! is chosen from linear or branched alkyl radicals having 1 to 10 atoms, preferably 1 to 4 carbon atoms, and linear or branched fluoroalkyl radicals having 1 to 10 carbon atoms, preferably 1 to 4 carbon atoms. Application in microelectronics.

Abstract: The present invention relates to an organic semiconductor device based on phthalocyanine. According to the invention, the device comprises a substrate constituted by a layer (10) of a conductive material covered by a layer (20) of a dielectric material, and a coating deposited on the layer of dielectric material and comprising an extrinsic molecular semiconductor (30) constituted by a monophthalocyanine of a divalent metal or by a hydrogenated monophthalocyanine, and an intrinsic molecular semiconductor (40) constituted by a phthalocyanine giving rise to free radicals.

Abstract: The present invention relates to a process for the preparation of lanthanide or yttrium diphthalocyanine, in which:(a) a mixture of lanthanide or yttrium derivative and phthalonitrile is heated, the reaction temperature being kept below the critical temperature of endothermicity, then(b) when an exothermicity appears the temperature is kept at a temperature below the decomposition temperature of the reactants,(c) the lanthanide or yttrium diphthalocyanine obtained is recovered.The products obtained may be used as electroactive agents.