Reduced reflectance cathode for organic light-emitting devices using metalorganic mixtures

Conductive light-absorbing layers made of mixtures of metals and organic materials are used as cathodes in organic light-emitting devices (OLEDs). Devices utilizing the reduced reflectance cathode, named Black Cathode™ OLEDs, demonstrate enhanced contrast even in high ambient illumination. OLEDs with a cathode made of a mixture of tris(8-hydroxyquinoline)aluminum (Alq3), Mg and Ag, or a mixture of Alq3 and Ag are addressed. Optical reflectance …