| 摘要 |
PROBLEM TO BE SOLVED: To provide phosphorescent light emitting materials that may have improved quantum efficiency and/or increased operational lifetime.SOLUTION: Heteroleptic complexes having at least one diarylamino or carbazole group, as shown in the specified formula (I), are provided. Organic light emitting devices etc. that comprise phosphorescent light emitting materials are also provided. In the formula: R, R, R, R, R, and Reach represent hydrogen, an alkyl group, or the like; Z is a single bond connecting the two phenyl rings, or is absent; when Z is absent, the positions on the phenyl rings may be substituted by Ror R; any two adjacent substituents are optionally joined together to form a ring; and m is 1 or 2. |
