US4524237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increased voltage photovoltaic cell
Assignee: National Aeronautics and Space Administration
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Filing: 1984-02-08
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Granted: 1985-06-18
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Expires: 2004-02-08
Abstract
Abstract A photovoltaic cell, such as a solar cell, is provided which has a higher output voltage than prior cells. The improved cell includes a substrate of doped silicon, a first layer of silicon disposed on the substrate and having opposite doping, and a second layer of silicon carbide disposed on the first layer. The silicon carbide preferably has the same type of doping as the first layer.
Inventors
- 👤 Bernd Ross, deceased
- 👤 Donald B. Bickler
- 👤 Brian D. Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:41
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/10; H10F77/12; H10F77/122; H10F77/1226; H10F10/00; H10F10/10; H10F10/14; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/547
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
54 words
A photovoltaic cell comprising: a substrate of crystalline silicon; a first layer of crystalline silicon disposed on said substrate; and a second layer disposed on said first layer; said substrate and said first layer having opposite types of doping, one being p-doped and the other being n-doped; said second layer comprising crystalline silicon carbide.
Claim 2
Dependent Claim
54 words
A photovoltaic cell comprising: a substrate of crystalline silicon; a first layer of crystalline silicon disposed on said substrate; and a second layer disposed on said first layer; said substrate and said first layer having opposite types of doping, one being p-doped and the other being n-doped; said second layer comprising crystalline silicon carbide.
Claim 3
Dependent Claim
20 words
The apparatus described in claim 1 wherein: said second layer has doping of the same type as said first layer.
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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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |