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US 11,637,251 B2Granted
Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsChuanjun Xia, Raymond C. Kwong, Suman Layek
Life of this patent
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Abstract
Novel compounds comprising heteroleptic iridium complexes are provided. The compounds have a particular combination of ligands which includes a single pyridyl dibenzo-substituted ligand. The compounds may be used in organic light emitting devices, particularly as emitting dopants, to provide devices having improved efficiency, lifetime, and manufacturing.
Claims19
A compound comprising a heteroleptic iridium complex having the
- formula:
- wherein X is selected from the group consisting of NR, O, S, BR, and Se;
- wherein R is selected from hydrogen and alkyl;
- wherein R1, R2, R3, and R4 each represent mono, di, tri, or tetra substitutions;
- wherein each R1, R2, R3, and R4 is independently selected from the group consisting of hydrogen, alkyl, and aryl;
- and
- wherein at least one R1 is other than hydrogen, at least one R2 is other than hydrogen, at least one R3 is other than hydrogen, and at least one R4 is other than hydrogen.
4 more elements
A first device comprising an organic light emitting device, further comprising:
- an anode;
- a cathode;
- and
- an organic layer, disposed between the anode and the cathode, the organic layer further comprising a compound comprising a heteroleptic iridium complex having the formula:
- wherein X is selected from the group consisting of NR, O, S, BR, and Se;
- wherein R is selected from hydrogen and alkyl;
- wherein R1, R2, R3, and R4 each represent mono, di, tri, or tetra substitutions;
- wherein each R1, R2, R3, and R4 is independently selected from the group consisting of hydrogen, alkyl, and aryl;
- and
- wherein at least one R1 is other than hydrogen, at least one R2 is other than hydrogen, at least one R3 is other than hydrogen, and at least one R4 is other than hydrogen.
7 more elements
Dependencies are inferred from the claim text.