Organic light emitting devices are disclosed which are comprised of a heterostructure for producing electroluminescence wherein the heterostructure is comprised of an emissive layer containing a phosphorescent dopant compound. For example, the phosphorescent dopant compound may be comprised of platinum...http://www.google.fr/patents/US6579632?utm_source=gb-gplus-shareBrevet US6579632 - OLEDs doped with phosphorescent compounds
