Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsPierre-Luc T. Boudreault, Bert Alleyne
Life of this patent
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Abstract
This present invention includes novel ligands for metal complexes, which include three fused cycles or heterocycles. The first ring may be either a pyridine or a pyrimidine ring, which coordinates with the iridium metal. The second ring may be a six-membered ring, which may or may not contain nitrogen atoms. The third ring may be either a five or six membered ring. The combination of these aromatic rings provides near infrared or infrared emission in PHOLEDs devices. The bottom ring of the ligand is an alkylated cycle or heterocycle which provides a good efficiency and emission line shape.
Claims20
A compound comprising a ligand LA, having a structure of
- wherein:
- the combination of ring A and R1 has a structure selected from the group consisting of:
- wherein each bond ------- is linked to the azaphenanthrene and each bond ″″″″″″ is linked to the metal;
- wherein LA is coordinated to an Ir atom;
- wherein LA is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand;
- and
- wherein Ir is optionally coordinated to other ligands.
A consumer product comprising an organic light-emitting device (OLED) comprising:
- an anode;
- a cathode;
- and
- an organic layer, disposed between the anode and the cathode, comprising a compound comprising a ligand LA,
- wherein:
- the combination of ring A and R1 has a structure selected from the group consisting of:
- wherein each bond ------- is linked to the azaphenanthrene and each bond ″″″″″″″ is linked to the metal;
- wherein LA is coordinated to an Ir atom;
- wherein LA is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand;
- and
- wherein Ir is optionally coordinated to other ligands.
An organic light-emitting device (OLED) comprising:
- an anode;
- a cathode;
- and
- an organic layer, disposed between the anode and the cathode, comprising a compound comprising a ligand LA,
- wherein:
- the combination of ring A and R1 has a structure selected from the group consisting of:
- wherein each bond ------- is linked to the azaphenanthrene and each bond ″″″″″″ is linked to the metal;
- wherein LA is coordinated to an Ir atom;
- wherein LA is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand;
- and
- wherein Ir is optionally coordinated to other ligands.
Dependencies are inferred from the claim text.