Patent ID: 9640772
Date: 2017-05-02
CPC Classifications: C09D,C09K,H01L

Claim:
1. A method of forming a light-emitting layer for an organic light-emitting diode, the method comprising: forming a layer of an ink composition in a pixel cell of a organic light-emitting diode pixel bank, the pixel cell comprising an emission region defined by a pixel bank, the ink composition comprising an organic electroluminescent material dissolved in an ester-based solvent system comprising at least one ester, the ester-based solvent system having a boiling point of at least 300° C. and a surface tension at 23° C. in the range from about 26 dyne/cm to about 33 dyne/cm; and allowing the solvent from the solvent system to evaporate, whereby the light-emitting layer is formed.