| abstract |
Heteroleptic complexes having at least one diarylamino or carbazole group, as shown in Formula (I), are provided: n n n n n n n n n n n n wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 each represent mono, di, tri, tetra, or penta substitutions or no substitution; wherein Z is a single bond connecting the two phenyl rings, or is absent, wherein when Z is absent, the positions on the phenyl rings may be substituted by R 5 or R 6 ; wherein any two adjacent substituents are optionally joined together to form a ring, which may be further substituted; wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 is independently selected from various substituents; and wherein m is 1 or 2. Devices, such as organic light emitting devices (OLEDs) that comprise phosphorescent light emitting materials are also provided. |