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US 2011/0215710 A1Published application
Phosphorescent materials
AssigneeUniversal Display Corporation
InventorsChuanjun Xia, Bert Alleyne, Nasrin Ansari
Life of this patent
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Abstract
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.
Claims39
A compound having the formula M(L)x(LI)y(L2)Z:
- wherein L is
- wherein Li is
- wherein L2 is
- wherein L1 and L2 can be the same or different;
- wherein M is a metal having an atomic number greater than 40;
- wherein x is 1, 2 or 3, y is 0, 1 or 2, z is 0, 1 or 2;
- wherein x+y+z is the oxidation state of the metal M;
- wherein A is a 6-membered heterocyclic ring;
- B, C, D, E and F are each independently a 5 or 6-membered carbocyclic or heterocyclic ring;
- wherein R is a 5 or 6-membered heterocyclic ring;
- wherein R is attached to A at a position para to the metal M;
- wherein RA, RB, RC, RD, RE and RF may represent mono, di, tri, tetra, or penta substitutions;
- wherein each of RA, RB, RC, RD, RE and RF is independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
- and
- wherein the ligand L is coordinated bidentately to the metal M.
12 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 comprising a first compound having the formula M(L)x(L1)y(L2)z:
- wherein L is
- wherein L1 is
- wherein L2 is
- wherein L1 and L2 can be the same or different;
- wherein M is a metal having an atomic number greater than 40;
- wherein x is 1, 2 or 3, y is 0, 1 or 2, z is 0, 1 or 2;
- wherein x+y+z is the oxidation state of the metal M;
- wherein A is a 6-membered heterocyclic ring;
- B, C, D, E and F are each independently a 5 or 6-membered carbocyclic or heterocyclic ring;
- wherein R is a 5 or 6-membered heterocyclic ring;
- wherein R is attached to A at a position para to the metal M;
- wherein RA, RB, RC, RD, RE and RF may represent mono, di, tri, tetra, or penta substitutions;
- wherein each of RA, RB, RC, RD, RE and RF is independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
- and
- wherein the ligand L is coordinated bidentately to the metal M.
16 more elements
Dependencies are inferred from the claim text.