NOVELTY - Process of application, on entire or part of the surface of a support, of an organic photovoltaic coating made of a mixture of organic semiconductor, which comprises at least one first organic semiconductor compound CP, of P-type, and at least one second organic semiconductor compound CN, of N-type, immiscible to compound CP in the obtained coating, comprises: depositing on entire or part of the surface of the support, a solution comprising CP and CN compounds in a solvent medium S0; and eliminating by evaporating the solvent S0 present in the deposit thus made on the support.    USE - The coating is useful in photovoltaic cell (claimed).    ADVANTAGE - The coating has improved mechanical properties and stability. The coating provides the photovoltaic devices with improved photovoltaic properties. The coating is devoid of additives, which are toxic or harmful to environment.    DETAILED DESCRIPTION - Process of application, on entire or part of the surface of a support, of an organic photovoltaic coating made of a mixture of organic semiconductor, which comprises at least one first organic semiconductor compound CP, of P-type, and at least one second organic semiconductor compound CN, of N-type, immiscible to compound CP in the obtained coating, comprises: (a) depositing on entire or part of the surface of the support, a solution comprising CP and CN compounds in a solvent medium S0 capable of solvating all compounds CP and CN without chemically reacting with them, where the solvent S0 is constituted by a mixture of a first fraction comprising a solvent or mixture of solvents S1 having a boiling point lower than that of CP and CN compounds and is capable of solvating both compounds CP or CN, and a second fraction, miscible with the first fraction, comprising a solvent or mixture of solvents S2 which has a boiling point greater than the solvent or mixture of solvents S1 and less than that of compounds Cp and CN and is capable of solvating one of compounds CP or CN but not the other (incapable of solvating CN or CP, respectively); and (b) eliminating by evaporating the solvent S0 present in the deposit thus made on the support. INDEPENDENT CLAIMS are included for:    (1) supports equipped with a photovoltaic coating obtainable by the process; and    (2) photovoltaic cell comprising a layer of photovoltaic type can be obtained as a coating.