The above objects have been accomplished by providing an OLED having an organic active (53) region with at least one emission layer (EL). The OLED further comprises at least one organic charge transport layer (52) (either a hole transport layer or an electron transport layer), an anode (51) and a cathode...http://www.google.de/patents/US6023073?utm_source=gb-gplus-sharePatent US6023073 - Organic/inorganic alloys used to improve organic electroluminescent devices
