US6097147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for high efficiency electroluminescent device
Assignee: Princeton University
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Filing: 1998-09-14
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Granted: 2000-08-01
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Expires: 2018-09-14
Abstract
Abstract A light emitting device including a pixel having a substantially transparent anode; a hole transporting layer over the anode; an emission layer over the hole transporting layer; a blocking layer over the emission layer; an electron transporting layer over the blocking layer; and a cathode in electrical contact with the electron transporting layer.
Inventors
- 👤 Marc A Baldo
- 👤 Diarmuid F. O'Brien
- 👤 Stephen R. Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:44
CPC Classifications
H; H10; H10K; H10K50/00; H10K50/10; H10K50/18; H05; H05B; H05B33/00; H05B33/12; H05B33/22; H10K50/11; H10K2101/00; H10K2101/10; H10K85/00; H10K85/30; H10K85/321; H10K85/324; H10K85/341; H10K85/346; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
53 words
A light emitting device including a pixel comprising: a substantially transparent anode; a hole transporting layer over said anode; an emission layer over said hole transporting layer; a blocking layer over said emission layer; an electron transporting layer over said blocking layer; and a cathode in electrical contact with said electron transporting layer.
Claim 2
Dependent Claim
53 words
A light emitting device including a pixel comprising: a substantially transparent anode; a hole transporting layer over said anode; an emission layer over said hole transporting layer; a blocking layer over said emission layer; an electron transporting layer over said blocking layer; and a cathode in electrical contact with said electron transporting layer.
Claim 3
Dependent Claim
27 words
The device of claim 1, wherein said blocking layer is characterized by a band gap greater than the energy level of excitons formed in said emission layer.
Claim 4
Dependent Claim
25 words
The device of claim 2, wherein said blocking layer comprises a material selected from the group consisting of BCP, Alq 3 , CBP, and NPD.
Claim 5
Dependent Claim
11 words
The device of claim 3, wherein said blocking layer comprises BCP.
Claim 6
Dependent Claim
14 words
The device of claim 4, wherein said emission layer comprises CBP doped with PtOEP.
Claim 7
Dependent Claim
12 words
The device of claim 1, wherein said anode comprises indium tin oxide.
Claim 8
Dependent Claim
16 words
The device of claim 1, wherein said emission layer also functions as an electron transporting layer.
Claim 9
Dependent Claim
13 words
The device of claim 1, wherein said emission layer emits light by phosphorescence.
Claim 10
Dependent Claim
16 words
The device of claim 8, wherein said emission layer comprises a phosphor in an organic host.
Claim 11
Dependent Claim
16 words
The device of claim 9, wherein said phosphor comprises PtOEP and said organic host comprises CBP.
Claim 12
Dependent Claim
13 words
The device of claim 1, wherein said emission layer emits light by fluorescence.
Claim 13
Dependent Claim
13 words
The device of claim 1, further comprising a transparent substrate under said anode.
Claim 14
Dependent Claim
10 words
The device of claim 12, wherein said substrate comprises glass.
Claim 15
Dependent Claim
23 words
The device of claim 1, wherein said cathode comprises a metal selected from the group consisting of aluminum, silver, gold, and alloys thereof.
Claim 16
Dependent Claim
18 words
The device of claim 1, further comprising a contact layer between said electron transporting layer and said cathode.
Claim 17
Dependent Claim
44 words
An electronic device incorporating the device of claim 1, said electronic device selected from the group consisting of a computer; a television; a large area wall, theater or stadium screen; a billboard; a sign; a vehicle; a printer; a telecommunication device; and a telephone.
Claim 18
Dependent Claim
93 words
A light emitting device including a pixel comprising: a transparent substrate; a substantially transparent anode over said substrate, said anode comprising indium tin oxide; a hole transporting layer over said anode, said hole transporting layer comprising NPD; an emission layer over said hole transporting layer, said emission layer comprising CBP and emitting light by phosphorescence; a blocking layer over said emission layer, said blocking layer BCP; an electron transporting layer over said blocking layer, said electron transporting layer comprising Alq 3 ; and a cathode in electrical contact with said electron transporting layer.
Claim 19
Dependent Claim
93 words
A light emitting device including a pixel comprising: a transparent substrate; a substantially transparent anode over said substrate, said anode comprising indium tin oxide; a hole transporting layer over said anode, said hole transporting layer comprising NPD; an emission layer over said hole transporting layer, said emission layer comprising CBP and emitting light by phosphorescence; a blocking layer over said emission layer, said blocking layer BCP; an electron transporting layer over said blocking layer, said electron transporting layer comprising Alq 3 ; and a cathode in electrical contact with said electron transporting layer.
Claim 20
Dependent Claim
62 words
A multicolor display device comprising a plurality of pixels, wherein at least one of said pixels comprises: a substantially transparent anode; a hole transporting layer over said anode; an emission layer over said hole transporting layer; a blocking layer over said emission layer; an electron transporting layer over said blocking layer; and a cathode in electrical contact with said electron transporting layer.
Claim 21
Dependent Claim
62 words
A multicolor display device comprising a plurality of pixels, wherein at least one of said pixels comprises: a substantially transparent anode; a hole transporting layer over said anode; an emission layer over said hole transporting layer; a blocking layer over said emission layer; an electron transporting layer over said blocking layer; and a cathode in electrical contact with said electron transporting layer.
Claim 22
Dependent Claim
27 words
The device of claim 18, wherein said blocking layer is characterized by a band gap greater than the energy level of excitons formed in said emission layer.
Claim 23
Dependent Claim
44 words
An electronic device incorporating the device of claim 18, said electronic device selected from the group consisting of a computer; a television; a large area wall, theater or stadium screen; a billboard; a sign; a vehicle; a printer; a telecommunication device; and a telephone.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-08-01 | 2004-01-31 | 2004-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-01 | 2008-01-31 | 2008-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-01 | 2012-01-31 | 2012-08-01 | $7700.00 | Window Closed / Lapsed |