Patent ID: 8211491

Claim:
A method for manufacturing a light-emitting element, the method comprising: forming a first electrode on a substrate; forming a first charge transport layer comprising one or more first charge transport materials that are polar compounds on the first electrode; depositing a first solution on the first charge transport layer, the first solution including a non-polar first solvent, to thus form a wet first non-polar solvent layer on the first charge transport layer; depositing a second solution on the first solution, the second solution including a first polar solvent and one or more light-emitting compounds dissolved in the first polar solvent to thus form a wet first polar solution layer disposed on the wet first non-polar solvent layer; simultaneously removing, by drying, both the polar solvent of the wet first polar solution layer and the non-polar solvent of the wet first non-polar solvent layer so that a solidified light-emitting layer comprising the one or more light-emitting compounds is formed on the first charge transport layer; and forming a second electrode on the light-emitting layer.