ORGANIC PHOTOVOLTAIC COATINGS WITH CONTROLLED MORPHOLOGY

摘要

The present invention relates to a method for producing a coating containing two organic semi-conductor compounds, CP and CN, respectively of type P and type N, CN being immiscible with compound CP in the coating produced. The invention comprises the following steps: (A) a solution is deposited on the surface of the support, containing compounds CP and CN in a solvent medium S capable of solvating compounds CP and CN without chemically reacting therewith, said solvent S being formed by a mixture of (i) a first fraction formed by a solvent or a mixture of solvents S1 capable of solvating the two compounds CP or CN and (ii) a second fraction, miscible with the first fraction, formed by a solvent or a mixture of solvents S2 with a higher boiling point than that of the solvent or mixture of solvents S1 and which is capable of selectively solvating one of the compounds CP or CN but not the other; and (B) the solvent S in the deposit thus produced is eliminated by evaporation.