US4270018A
Expired / Lapsed
US
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Amorphous solar cells
Assignee: Sera Solar Corp
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Filing: 1979-12-26
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Granted: 1981-05-26
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Expires: 1999-12-26
Abstract
Abstract A solar cell having single crystal or polycrystalline n-type and p-type layers separated by an amorphous layer.
Inventors
- 👤 James F. Gibbons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:33
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/10; H10F77/16; H10F77/162; H10F77/164; H10F77/1642; H10F10/00; H10F10/10; H10F10/17; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/546; Y02E10/548
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
A solar cell comprising a n-type and p-type silicon single crystal or polycrystalline collecting layers separated by an amorphous layer that serves as a layer which absorbs the optical energy and generates carriers.
Claim 2
Dependent Claim
33 words
A solar cell comprising a n-type and p-type silicon single crystal or polycrystalline collecting layers separated by an amorphous layer that serves as a layer which absorbs the optical energy and generates carriers.
Claim 3
Dependent Claim
21 words
A solar cell as in claim 1 in which the amorphous layer is of different semiconductor material from said collecting layers.
Claim 4
Dependent Claim
43 words
A solar cell as in claims 1 or 2 in which the amorphous layer is provided with a doping gradient to provide an extended drift field within the amorphous layer to further assist carrier transport to the single crystal or crystalline collecting layers.
References Cited (Backward Citations)
US4024558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |