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US 9,175,211 B2Granted
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.
Claims27
A heteroleptic 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 Ir;
- wherein x is 1 or 2 , y is 1 or 2, z is 0, 1 or 2;
- wherein x+y+z is the oxidation state of the metal M;
- wherein ring C is pyridine;
- wherein ring D is phenyl;
- wherein rings B, E and F are each independently a 5 or 6-membered carbocyclic or heterocyclic ring;
- wherein L and L1 are different;
- wherein R is a 6-membered heterocyclic aromatic ring that contains at least one nitrogen atom, wherein R is, optionally, further substituted by one or more of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
- wherein RA, RB, RC, RD, RE and RF may represent mono, di, tri, or tetra 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, wherein said compound is heteroleptic.
13 more elements
A compound selected from the group consisting of:
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 heteroleptic 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 Ir;
- wherein x is 1 or 2, y is 1 or 2, z is 0, 1 or 2;
- wherein x+y+z is the oxidation state of the metal M;
- wherein ring C is pyridine;
- wherein ring D is phenyl;
- wherein rings B, E and F are each independently a 5 or 6-membered carbocyclic or heterocyclic ring;
- wherein L and L1 are different;
- wherein R is a 6-membered heterocyclic aromatic ring that contains at least one nitrogen atom, wherein R is, optionally, further substituted by one or more of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
- wherein RA, RB, RC, RD, RE and RF may represent mono, di, tri, or tetra 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, wherein said first compound is heteroleptic.
17 more elements
Dependencies are inferred from the claim text.