US5776622A
Expired / Lapsed
US
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Bilayer eletron-injeting electrode for use in an electroluminescent device
Assignee: Global OLED Technology LLC
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Filing: 1996-07-29
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Granted: 1998-07-07
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Expires: 2016-07-29
Abstract
Abstract An electroluminescent device comprising an anode, an electroluminescent layer, and a cathode. The cathode includes a fluoride layer contacting the electroluminescent layer, a conductive layer contacting the fluoride layer, and the thickness of the fluoride layer being selected so that the bilayer acts as an electron injecting contact, the bilayer providing stability against atmospheric corrosion.
Inventors
- 👤 Liang-Sun Hung
- 👤 Ching W. Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:23
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; H10; H10K; H10K50/00; H10K50/80; H10K50/805; H10K50/82; H10K50/826; H10K85/00; H10K85/30; H10K85/311; H10K85/321; H10K85/324; H10K85/60; H10K85/631; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
62 words
An electroluminescent device comprising an anode, an electroluminescent layer, and a cathode, said cathode comprises a bilayer structure, comprising: a) a fluoride layer contacting the electroluminescent layer; b) a conductive layer contacting the fluoride layer; and c) the thickness of the fluoride layer being selected so that the bilayer acts as an electron injecting contact, the bilayer providing stability against atmospheric corrosion.
Claim 2
Dependent Claim
62 words
An electroluminescent device comprising an anode, an electroluminescent layer, and a cathode, said cathode comprises a bilayer structure, comprising: a) a fluoride layer contacting the electroluminescent layer; b) a conductive layer contacting the fluoride layer; and c) the thickness of the fluoride layer being selected so that the bilayer acts as an electron injecting contact, the bilayer providing stability against atmospheric corrosion.
Claim 3
Dependent Claim
21 words
The cathode of claim 1 wherein the thickness of the fluoride layer is in a range of 0.3 to 5.0 nm.
Claim 4
Dependent Claim
19 words
The cathode of claim 1 wherein said fluoride is selected from an alkali fluoride, or an alkaline earth fluoride.
Claim 5
Dependent Claim
17 words
The cathode of claim 1 wherein said conductive layer is elemental metal, metal alloy, or conductive materials.
Claim 6
Dependent Claim
22 words
The cathode of claim 3 wherein said alkali fluoride includes lithium fluoride, sodium fluoride, potassium fluoride, rubidium, robidium fluoride, or cesium fluoride.
Claim 7
Dependent Claim
20 words
The cathode of claim 3 wherein said alkaline earth fluoride includes magnesium fluoride, calcium fluoride, strontium fluoride, or barium fluoride.
Claim 8
Dependent Claim
18 words
The conductive cathode of claim 4 wherein said conductive materials include a conductive boride, carbide, nitride, or oxide.
Claim 9
Dependent Claim
77 words
In an electroluminescent device having, in sequence, a substrate, a transmissive and conductive hole-injecting anode, an organic electroluminescent layer, and a cathode in contact with the organic electroluminescent layer, the cathode layer comprising: a) a fluoride layer contacting the organic layer; b) a conductive overcoat layer over the fluoride layer; and c) the thickness of the fluoride layer being selected so that the bilayer acts as an electron injecting contact, the bilayer providing stability against atmospheric corrosion.
Claim 10
Dependent Claim
77 words
In an electroluminescent device having, in sequence, a substrate, a transmissive and conductive hole-injecting anode, an organic electroluminescent layer, and a cathode in contact with the organic electroluminescent layer, the cathode layer comprising: a) a fluoride layer contacting the organic layer; b) a conductive overcoat layer over the fluoride layer; and c) the thickness of the fluoride layer being selected so that the bilayer acts as an electron injecting contact, the bilayer providing stability against atmospheric corrosion.
Claim 11
Dependent Claim
21 words
The device of claim 8 wherein the thickness of the fluoride layer is in a range of 0.3 to 5.0 nm.
Claim 12
Dependent Claim
12 words
The device of claim 8 wherein said cathode is encapsulated or uncapsulated.
Claim 13
Dependent Claim
58 words
An electroluminescent device comprising: a single crystal semiconductor substrate, a bilayer electrode including a conductive layer on the substrate and an overlying fluoride layer, the thickness of the fluoride layer being in a range of 0.3 to 5nm; an organic electroluminescent layer; and a hole-injecting transparent electrode having a work function with a value greater than 4.1 eV.
Claim 14
Dependent Claim
58 words
An electroluminescent device comprising: a single crystal semiconductor substrate, a bilayer electrode including a conductive layer on the substrate and an overlying fluoride layer, the thickness of the fluoride layer being in a range of 0.3 to 5nm; an organic electroluminescent layer; and a hole-injecting transparent electrode having a work function with a value greater than 4.1 eV.
Claim 15
Dependent Claim
37 words
The device of claim 11 wherein said substrate is selected from the group consisting of Si, Ge, GaAs, GaP, GaN, GaSb, InAs, InP, InSb, or Al x Ga 1-x As, where x is from 0 to 1.
Claim 16
Dependent Claim
19 words
The device of claim 11 wherein said fluoride is selected from an alkali fluoride, or an alkaline earth fluoride.
Claim 17
Dependent Claim
18 words
The device of claim 11 wherein said conductive overcoat layer is elemental metal, metal alloy, or conductive materials.
Claim 18
Dependent Claim
22 words
The device of claim 13 wherein said alkali fluoride includes lithium fluoride, sodium fluoride, potassium fluoride, rubidium, robidium fluoride, or cesium fluoride.
Claim 19
Dependent Claim
20 words
The device of claim 13 wherein said alkaline earth fluoride includes magnesium fluoride, calcium fluoride, strontium fluoride, or barium fluoride.
Claim 20
Dependent Claim
17 words
The device of claim 14 wherein said conductive materials include a conductive boride, carbide, nitride, or oxide.
Claim 21
Dependent Claim
31 words
The device of claim 11 wherein the organic electroluminescent layer is selected from the group of poly(paraphenylene vinylene) (PPV), PPV copolymer and derivatives, polyaniline, poly(3-alkylthiophene), poly(3-octylthiophene), poly(paraphenylene), or 8-hydroxyquinoline aluminum (Alq).
Claim 22
Dependent Claim
19 words
The device of claim 11 wherein said hole-injecting transparent electrode is a conducting oxide or a thin metal layer.
Claim 23
Dependent Claim
21 words
The device of claim 19 wherein said conducting oxides includes indium-tin-oxide, aluminum- or indium-doped zinc oxide, tin oxide, magnesium-indium-oxide, or cadmium-tin-oxide.
Claim 24
Dependent Claim
20 words
The device of claim 19 wherein said hole-injecting electrode is selected from the group consisting of noble and near-noble metals.
Claim 25
Dependent Claim
18 words
The device of claim 21 wherein said noble and near-noble metals include gold, silver, nickel, palladium, and platinum.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-07-06 | 2002-01-05 | 2002-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-06 | 2006-01-05 | 2006-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-06 | 2010-01-05 | 2010-07-07 | $7700.00 | Window Closed / Lapsed |