The present invention relates to organic light emitting devices (OLEDs), and more specifically to efficient OLEDs comprising an array of pixels and having reduced pixel shrinkage. The devices of the present invention comprise further relates to materials for use as emissive materials which give reduced...http://www.google.de/patents/US7029765?utm_source=gb-gplus-sharePatent US7029765 - Organic light emitting devices having reduced pixel shrinkage
