In an organic EL device comprising organic layers between a pair of electrodes participating in at least a light emitting function, at least one organic layer contains an organic compound selected from naphthacene, tetraaryldiamine, anthracene and quinoxaline derivatives as a host material and an organic...http://www.google.de/patents/US6613454?utm_source=gb-gplus-sharePatent US6613454 - Organic EL device
