TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method comprises preparing the first mixture (M1) including (C(N)) and (C(p)) within a solvent medium (S1), adding, to (M1), a crosslinking additive as mixture (M2) comprising additive within a second solvent medium (S2) under conditions of sufficiently low temperature to inhibit the precipitation by crosslinking one and/or other organic semiconductors with crosslinking additive, and disposing the mixture (M) on the surface of the substrate and eliminating the solvent (S) by evaporating to ensure crosslinking. The depositing step is carried out at a temperature of less than 50 degrees C, preferably less than 40 degrees C. Preferred Components: The organic semiconductors (C(N)) consist of: fullerenes and their derivatives, preferably (6,6)-phenyl-61C-butyric acid methyl ester, (6,6)-phenyl-60C-butyric acid methyl ester, (6,6)-phenyl-70C-butyric acid methyl ester and (6,6)-phenyl-71C-butyric acid methyl ester; polyfluorene type polymers; poly-oxa-1,4-phenylene-(1-cyano-1,2-vinylene)-(2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylene)-1,2-(2-cyanovinylene)-1,4-phenylene; and poly(styrene sulfonate). The organic semiconductors (C(P)) consist of: derivatives of polythiophene, preferably poly(3-hexylthiophene-2,5-diyl); tetracene; anthracene; polythiophenes; derivatives of polyphenylene-vinylene, preferably poly(2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylene-vinylene) and poly(2-methoxy-5-(2-ethyl-hexyloxy)-1,4-phenylene-vinylene); and polymers with low band gap, preferably poly(2,7-carbazole-alt-4,7-dithienyl-2,1,3-benzothiadiazole). The molar ratio of crosslinking agent/semiconductors (C(N)) is less than 2, preferably less than 1. The solvent (S) of the mixture (M) comprises a mixture of: a first fraction (F1) that consists of a solvent or its mixture with a boiling point lower than (C(P)) and (C(N)) and solvating (C(P)) and (C(N)); a second fraction (F2) consisting of a solvent or its mixture with a boiling point that is greater than (C(P)) and (C(N)). The crosslinking agent is 4,4'-bis(azidomethyl)-1,1'-biphenyl.