| abstract |
The present description relates to a formulation comprising a p-type organic semiconductor material, an n-type semiconductor material and a non-aqueous solvent, wherein the concentration of the p-type organic semiconductor material is 4 mg/mL to 25 mg/mL per milliliter of solvent, and the proportion between the n-type organic semiconductor material and the n-type organic semiconductor material ranges from 1:1 to 1:2 by weight. |