abstract |
The present invention relates to a formulation containing at least one organic functional material and at least two different organic solvents, a first organic solvent A and a second organic solvent B, wherein the first organic solvent A has a boiling point in the range from 250 to 350°C and a viscosity of > 15 mPas, the second organic solvent B has a boiling point in the range from 200 to 350°C and a viscosity of ≤ 10mPas, the solubility of the at least one organic functional material in the second organic solvent B is ≥ 5 g/l, and the boiling point of the first organic solvent A is at least 10°C higher than the boiling point of the second organic solvent B; as well as to electroluminescent devices prepared by using these formulations. |