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

摘要: Conductive light-absorbing layers made of mixtures metals and organic materials are used as cathodes in light-emitting devices (OLEDs). Devices utilizing the reduced reflectance cathode, named Black Cathode™ OLEDs, demonstrate enhanced contrast even high ambient illumination. OLEDs with a cathode mixture tris(8-hydroxyquinoline)aluminum (Alq3), Mg Ag, or Alq3 Ag addressed. Optical absorption measurements well OLED electrical characterization tests performed on various Cathode also reference device standard Mg:Ag cathode. The studied ∼9%–12% sun/eye-integrated (SEIR), ∼8× lower than that device, while turn-on voltage stability comparable. In modified ∼1.8% SEIR has been recently realized.