US5128587A
Expired / Lapsed
US
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Electroluminescent device based on organometallic membrane
Assignee: MOLTECH Corp A CORP OF NEW YORK
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Filing: 1990-09-13
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Granted: 1992-07-07
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Expires: 2010-09-13
Abstract
Abstract The present invention relates to electroluminescent devices, which may be used as colored display elements in indicator devices or flat plate multicolored displays. Electroluminescent elements can be categorized as natural or injection type. The present invention relates to injection type electroluminescent devices which operate by the application of a current through the system, creating luminescence at a p-n junction.
Inventors
- 👤 Terje Skotheim
- 👤 Yoshiyuki Okamoto
- 👤 Junji Kido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:01
CPC Classifications
H; H10; H10K; H10K85/00; H10K85/30; H10K85/351; H10K50/00; H10K50/10; H10K50/11; H10K50/14; H10K50/17; H10K85/321; H10K85/324
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
59 words
An electroluminescent device for emitting highly monochromatic light, said electroluminescent device comprising in sequence: (a) a substrate which is transparent to visible light, (b) a first electrode which is transparent to visible light, (c) a hole conduction layer which is transparent to visible light, (d) a luminescence layer containing organometallic complexes of the lanthanide series, (e) a second electrode.
Claim 2
Dependent Claim
59 words
An electroluminescent device for emitting highly monochromatic light, said electroluminescent device comprising in sequence: (a) a substrate which is transparent to visible light, (b) a first electrode which is transparent to visible light, (c) a hole conduction layer which is transparent to visible light, (d) a luminescence layer containing organometallic complexes of the lanthanide series, (e) a second electrode.
Claim 3
Dependent Claim
11 words
The electroluminescent device of claim 1, wherein the substrate is glass.
Claim 4
Dependent Claim
20 words
The electroluminescent device of claim 1, wherein the transparent first electrode is a thin film of an electrically conducting oxide.
Claim 5
Dependent Claim
18 words
The electroluminescent device of claim 1, wherein the hole conducting layer is an organic or inorganic p-type semiconductor.
Claim 6
Dependent Claim
31 words
The electroluminescent device of claim 1, wherein the organometallic complexes are imbedded in a membrane consisting of compounds capable of forming coordination complexes with the excited state of said organometallic complexes.
Claim 7
Dependent Claim
30 words
The electroluminescent device of claim 5, wherein the luminescent element is a bilayer consisting of a first layer of said organometallic complexes and a second layer consisting of said membrane.
Claim 8
Dependent Claim
16 words
The electroluminescent device of claim 1, wherein the second electrode is a low work function metal.
Claim 9
Dependent Claim
28 words
The electroluminescent device of claim 4, wherein the hole conducting layer is selected from organic amines, amorphous hydrogenated silicon amorphous hydrogenated SiC, microcrystalline SiC or conducting organic polymers.
Claim 10
Dependent Claim
28 words
The electroluminescent device of claim 1, wherein the organometallic complexes contain lanthanide elements selected from Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb.
Claim 11
Dependent Claim
27 words
The electroluminescent device of claim 5, wherein the organometallic complexes are imbedded in a membrane selected from rubrene, p-terphenyl, 2,5-diphenyloxazole, cyanine dyes, aromatic amines or 8-hydroxyquinoline aluminum.
Claim 12
Dependent Claim
19 words
The electroluminescent device of claim 1, wherein the second electrode is selected from Al, Mg, Li, or Mg-Ag alloys.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1995-07-07 | 1996-01-06 | 1996-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-07 | 2000-01-06 | 2000-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-07 | 2004-01-06 | 2004-07-07 | $7700.00 | Window Closed / Lapsed |