Organic light-emitting diode devices with improved operational stability
First Claim
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1. An organic light-emitting device, comprising:
- a) a substrate;
b) an anode and a cathode disposed over the substrate;
c) a luminescent layer disposed between the anode and the cathode wherein the luminescent layer includes a host and at least one dopant;
d) the host of the luminescent layer being selected to include a solid organic material comprising a mixture of at least two components wherein;
i) the first component of the mixture is an organic compound that is capable of transporting either electrons or holes or both and is capable of forming both monomer state and an aggregate state and further is capable of forming the aggregate state either in the ground electronic state or in the excited electronic state that results in a different absorption or emission spectrum or both relative to the absorption or emission spectrum or both of the monomer state, respectively, or the first component of the mixture is capable of forming the aggregate state whose presence results in a quantum yield of luminescence of the monomer state being different relative to the quantum yield of luminescence of the monomer state in the absence of the aggregate state, andii) the second component of the mixture is an organic compound that upon mixing with the first host component is capable of forming a continuous and substantially pin-hole-free layer;
iii) both the first and second components being selected to transfer excitation energy to the dopant so that the dopant produces light while the first and second components produce no light in the presence of the dopant; and
e) the dopant of the luminescent layer being selected to produce light from the light-emitting device.
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Abstract
An organic light-emitting device includes a substrate, an anode and a cathode disposed over the substrate, and a luminescent layer disposed between the anode and the cathode wherein the luminescent layer includes a host and at least one dopant. The host of the luminescent layer is selected to include a solid organic material comprising a mixture of at least two components, one of which is capable of forming both monomer state and an aggregate state.
200 Citations
108 Claims
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1. An organic light-emitting device, comprising:
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a) a substrate; b) an anode and a cathode disposed over the substrate; c) a luminescent layer disposed between the anode and the cathode wherein the luminescent layer includes a host and at least one dopant; d) the host of the luminescent layer being selected to include a solid organic material comprising a mixture of at least two components wherein; i) the first component of the mixture is an organic compound that is capable of transporting either electrons or holes or both and is capable of forming both monomer state and an aggregate state and further is capable of forming the aggregate state either in the ground electronic state or in the excited electronic state that results in a different absorption or emission spectrum or both relative to the absorption or emission spectrum or both of the monomer state, respectively, or the first component of the mixture is capable of forming the aggregate state whose presence results in a quantum yield of luminescence of the monomer state being different relative to the quantum yield of luminescence of the monomer state in the absence of the aggregate state, and ii) the second component of the mixture is an organic compound that upon mixing with the first host component is capable of forming a continuous and substantially pin-hole-free layer; iii) both the first and second components being selected to transfer excitation energy to the dopant so that the dopant produces light while the first and second components produce no light in the presence of the dopant; and e) the dopant of the luminescent layer being selected to produce light from the light-emitting device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108)
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Specification
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Current AssigneeGlobal OLED Technology LLC (LG Display Co., Ltd.)
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Original AssigneeEastman Kodak Company
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InventorsJarikov, Viktor V.
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Primary Examiner(s)GARRETT, DAWN L
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Application NumberUS10/634,324Publication NumberTime in Patent Office1,302 DaysField of Search428/690, 428/917, 313/504, 313/506US Class Current428/690CPC Class CodesC09K 11/06 containing organic luminesc...C09K 2211/1003 Carbocyclic compoundsC09K 2211/1011 Condensed systemsH10K 2101/90 Multiple hosts in the emiss...H10K 50/11 characterised by the electr...H10K 85/324 comprising aluminium, e.g. ...H10K 85/622 containing four rings, e.g....H10K 85/623 containing five rings, e.g....H10K 85/624 containing six or more ringsH10K 85/653 comprising only oxygen as h...H10K 85/654 comprising only nitrogen as...H10K 85/656 comprising two or more diff...H10K 85/657 Polycyclic condensed hetero...Y10S 428/917 Electroluminescent
