Materials and structures for enhancing the performance of organic light emitting devices
First Claim
1. A device, comprising:
- an anode;
a cathode;
a first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises a material that produces phosphorescent emission when a voltage is applied between the anode and the cathode; and
a second organic layer disposed between the first organic layer and the cathode, wherein the second organic layer is in direct contact with the first organic layer, and wherein the second organic layer comprises an aromatic non-heterocyclic hydrocarbon material.
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Abstract
A device is provided, having an anode, a cathode, and a first organic layer disposed between the anode and the cathode. The first organic layer comprises a material that produces phosphorescent emission when a voltage is applied between the anode and the cathode. A second organic layer is disposed between the first organic layer and the cathode. The second organic layer is in direct contact with the first organic layer. The second organic layer may comprise an aromatic hydrocarbon material, comprising an aromatic non-heterocyclic hydrocarbon core optionally substituted, and wherein the substituents are the same or different, and each is selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, heteroalkyl, substituted aryl, substituted heteroaryl and heterocyclic groups. The second organic layer may comprise a material having a molecular dipole moment less than about 2.0 debyes, such that the device has an unmodified external quantum efficiency of at least about 3% and a lifetime of at least about 1000 hours at an initial luminance of about 100 to about 1000 cd/m2. The second organic layer may be in direct contact with the cathode, or there may be a separate organic layer between the second organic layer and the cathode.
745 Citations
53 Claims
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1. A device, comprising:
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an anode;
a cathode;
a first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises a material that produces phosphorescent emission when a voltage is applied between the anode and the cathode; and
a second organic layer disposed between the first organic layer and the cathode, wherein the second organic layer is in direct contact with the first organic layer, and wherein the second organic layer comprises an aromatic non-heterocyclic hydrocarbon material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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12. A device, comprising:
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an anode;
a cathode;
an first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises a material that produces phosphorescent emission when a voltage is applied between the anode and the cathode;
a second organic layer disposed between the first organic layer and the cathode, wherein the second organic layer is in direct contact with the first organic layer, and wherein the second organic layer comprises an aromatic non-heterocyclic hydrocarbon material having a highest occupied molecular orbital that is at least 0.81 eV less than the highest occupied molecular orbital of the hole transporting material in the first organic layer. - View Dependent Claims (13)
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14. A device, comprising:
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an anode;
a cathode;
an first organic layer disposed between the anode and the cathode, wherein the first organic layer is comprises a material that produces phosphorescent emission when a voltage is applied between the anode and the cathode;
a second organic layer disposed between the first organic layer and the cathode, wherein the second organic layer is in direct contact with the first organic layer, and wherein the second organic layer comprises an aromatic non-heterocyclic hydrocarbon material, and wherein the device has an unmodified external quantum efficiency of at least about 3% and a lifetime of at least about 1000 hours at an initial luminance of about 100 to about 1000 cd/m2. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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45. A device, comprising:
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an anode;
a cathode;
a first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises a material that produces phosphorescent emission when a voltage is applied between the anode and the cathode; and
a second organic layer disposed between the first organic layer and the cathode, wherein the second organic layer is in direct contact with the first organic layer, and wherein the second organic layer comprises aromatic material selected from the group consisting of;
wherein;
R1—
R10 each represent no substitution, mono-, di-, or tri- substitution, R11—
R13, R15—
R18, each represents no substitution, mono-, di-, or tri- substitution, and R14, R19, and R20—
R25 each represents no substitution, mono-, di-, or tri- or tetra- substitution, andand wherein R1—
R25 are the same or different substituents, and each is selected from the group consisting of alkyl, alkenyl, aryl, heteroalkyl, substituted aryl, substituted heteroaryl and heterocyclic groups. - View Dependent Claims (46, 47, 48)
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49. A device, comprising:
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an anode;
a cathode;
a first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises a material that produces phosphorescent emission when a voltage is applied between the anode and the cathode; and
a second organic layer disposed between the first organic layer and the cathode, wherein the second organic layer is in direct contact with the first organic layer, and wherein the second organic layer comprises an aromatic material wherein the aromatic material includes a core comprising at least 3 phenyl rings, wherein each phenyl ring in the core is connected to every other phenyl ring in the core either directly, or by a chain of phenyl rings that are either fused or attached by a single C—
C bond. - View Dependent Claims (50)
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- 51. A compound, having the structure:
Specification