Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsDavid KNOWLES, Chun LIN, Peter MACKENZIE, Jui-Yi TSAI, Robert W. WALTERS, Scott BEERS, Cory S. BROWN, Walter YEAGER
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Abstract
Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a: 1′,2′-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.
Claims20
A phosphorescent compound comprising a metal and a monoanionic, bidentate ligand as set forth below, wherein the metal is selected from the group consisting of the non-radioactive metals with atomic numbers greater than 40, and wherein the bidentate ligand may be linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand;
- wherein:
- E1a-q are selected from the group consisting of C and N and collectively comprise an 18 pi-electron system;
- provided that E1a and E1p are different;
- and
- R1a-i are each, independently, H, hydrocarbyl, heteroatom substituted hydrocarbyl, cyano, fluoro, OR2a, SR2a, NR2aR2b, BR2aR2b, or SiR2aR2bR2c, where R2a-c are each, independently, hydrocarbyl or heteroatom substituted hydrocarbyl, and where any two of R1a-i and R2a-c may be linked to form a saturated or unsaturated, aromatic or non-aromatic ring;
- provided that R1a-i is other than H when attached to N, and
- is excluded from the bidentate ligand.
Dependencies are inferred from the claim text.