Organische elektrolumineszente Vorrichtung mit stabilisierter Kathode.

摘要

An organic electroluminescent device (100) is disclosed which is protected from dark spot formation. The device is comprised of, in sequence, a support (102), an anode (104), an organic electroluminescent medium (106), and a cathode (118). The cathode (118) contains a plurality of metals, at least one of which is a low work function metal other than an alkali metal. Overlying the cathode (118) is a protective layer (122) comprised of a mixture of at least one organic component of the organic electroluminescent medium and at least one metal having a work function in the range of from 4.0 to 4.5 eV capable of being oxidized in the presence of ambient moisture.