Patent ID: 8216633

Claim:
A method for producing a layer of organic material, the method comprising: depositing on a substrate surface, under deposition conditions, a layer of a solution comprising an organic material dissolved in a solvent, wherein said deposition conditions comprise a deposition temperature, a deposition pressure, and a deposition atmosphere; annealing said layer of solution, said annealing being applied before said layer of solution has been dried out completely, such that the solvent or a part of the solvent is still present in the layer, and a duration of said annealing being limited such that said layer of solution is not dried out completely during the annealing, said annealing inducing reflow of said layer of solution whereby the organic material is redistributed on the substrate surface; and thereafter drying out said layer of solution by substantially completely removing the solvent from the layer, said drying out being controlled by reducing an evaporation speed of the solvent, such that drying is performed slower than it would under the deposition conditions, wherein the evaporation speed of the solvent is reduced by changing one or more environmental parameters in a manner selected from the group consisting of lowering a drying temperature to below the deposition temperature, raising a drying pressure to above the deposition pressure, and raising an amount of the solvent in the drying atmosphere such that the drying atmosphere is saturated with the solvent.