Patent ID: 7361415

Claim:
A heterostructured organic light-emitting device comprising at least one emissive layer comprising at least one host material and at least one dopant complex, the dopant complex comprising a transition metal coordinated to two bidentate NO-type ligands or a tetradentate NOON-type ligand, and the dopant complex is of the formula or mixtures thereof, wherein M is selected from the group consisting of Ni, Pd and Pt; each R 1 -R 10 is independently —H, —OH, —NH 2 , -halogen, —CN, —NO 2 ; —R 13 , —OR 14 , —NHR 14 , or —N(R 14 ) 2 ; R 11 is —(C(R 15 ) 2 ) x —, where each R 12 is independently selected from the group consisting of —H, —(C 1 -C 6 )alkyl, -phenyl, -naphthyl; -halogen, and —CN; R 13 is -halogen; —(C 1 -C 6 )alkyl, -phenyl, or -naphthyl, each of which is unsubstituted or substituted with one or more —(C 1 -C 6 )alkyl, -phenyl, or -naphthyl; R 14 is as defined above for R 13 less halogen; and R 15 is as defined above for R 1 ; x is an integer number from 1 to 6.