Patent ID: 8450725

Claim:
A transducer comprising: an insulating substrate; and two electrodes and a semiconductor sensitive element deposited on said insulating substrate wherein, the sensitive element is formed by a layer of a semiconductor molecular material M 1 which has a conductivity C 1 and a layer of a semiconductor molecular material M 2 which has a conductivity C 2 and a bandgap E g2 <1 eV; the layer of material M 1 is in contact with the electrodes; the layer of material M 2 is deposited on the layer of material M 1 and is not in contact with the electrodes; the conductivities are such that C 2 /C 1 ≧1; and the material M 1 is: a monophthalocyanine M II Pc of a metal M in oxidation state II chosen from Fe, Co, Ni, Cu, Zn, Pt and Pd; a monophthalocyanine M III Pc of a metal M in oxidation state III in the form GaOH, GaCl, InCl, AlCl, AlF or AlOH; a monophthalocyanine M IV Pc of a metal M in an oxidation state IV in the form Si(OH) 2 , SiCl 2 , SnCl 2 , TiO or VO; a polyphthalocyanine, the repeat unit of which is MPc, the metal M being in the form SiO, SnO, GeO, FePyrazine, RuPyrazine, AlF or GaF; an organic compound chosen from oligothiophenes, whether substituted or not, tetracenes, pentacenes, fullerenes, tetracarboxylic naphthalenes, naphthalene dianhydrides, naphthalene diimides, tetracarboxylic perylenes, perylene dianhydrides, perylene diimides, triarylamines, triphenylenes and tetracyanoquinodimethanes; or a semiconductor polymer chosen from polythiophenes and polyparaphenylenevinylenes.