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US09175211B2 Phosphorescent materials 有权
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Phosphorescent materials
摘要:
Compounds comprising a 2-phenylpyridine ligand further substituted with a heterocyclic group are provided. In particular, the compound comprises a 2-phenylpyridine ligand further substituted with a nitrogen-containing heterocycle. The compounds may be used in organic light emitting devices to provide devices having improved efficiency and lifetime.
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