Self-metered solution-processable organic light-emitting devices based on small molecular emissive layers doped with interface-engineering additives

摘要

The present invention provides an SM OLED in which a light emitting layer is produced by using a self-metering solution coating process of H-dip coating or slot die coating, wherein the light emitting layer comprises 4,4 ', 4 " (9-carbazolyl) -triphenylamine (TcTa), and 2,7-bis (diphenylphosphoryl) -9,9'-spirobifluorene (SPPO13) are used as an electron transporting material. These phosphors are blue, green, Complex). In addition, polyoxyethylene (n) tridecyl ether (PTE) as an interface-engineering additive is mixed into a low molecular weight luminescent layer for improving electron injection and hole blocking characteristics at an anode interface and improving thin film formation.