Patent JPS575661U successfully refreshed from Google Patents.
US4544799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window structure for passivating solar cells based on gallium arsenide
Assignee: DELAWARE NEWARK DE 19716 A CORP OF, University of
•
Filing: 1984-04-30
•
Granted: 1985-10-01
•
Expires: 2004-04-30
Abstract
Abstract Passivated gallium arsenide solar photovoltaic cells with high resistance to moisture and oxygen are provided by means of a gallium arsenide phosphide window graded through its thickness from arsenic rich to phosphorus rich.
Inventors
- 👤 Allen M. Barnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:05
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/14; H10F10/144; H10F77/00; H10F77/30; H10F77/306; H10F77/311; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/544
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
A gallium arsenide photovoltaic device with a layered structure having a window layer of gallium arsenide phosphide graded from an arsenic-rich portion in contact with the adjacent photovoltaically active gallium arsenide layer to a phosphorus-rich portion remote from the photovoltaically active layer.
Claim 2
Dependent Claim
42 words
A gallium arsenide photovoltaic device with a layered structure having a window layer of gallium arsenide phosphide graded from an arsenic-rich portion in contact with the adjacent photovoltaically active gallium arsenide layer to a phosphorus-rich portion remote from the photovoltaically active layer.
Claim 3
Dependent Claim
21 words
The photovoltaic device of claim 1 wherein the phosphorus-rich portion of the window layer has a thickness less than 1.0 micrometer.
Claim 4
Dependent Claim
21 words
The photovoltaic device of claim 2 wherein the thickness of the phosphorus-rich portion has a thickness of less that 0.05 micrometer.
Claim 5
Dependent Claim
85 words
A photovoltaic solar cell having a layered structure comprising in order, a transparent electrical contact, an optically transparent window layer, a gallium arsenide absorber-generator layer, a gallium arsenide collector-converter layer, wherein the absorber-generator and the collector-converter layers respectively are doped to provide opposite conductivity types, and an optically opaque electrically conductive layer, wherein the optically transparent window layer is gallium arsenide phosphide graded from a phosphorus-rich portion in contact with transparent electrical contact and an arsenic-rich portion in contact with the gallium arsenide absorber-generator layer.
Claim 6
Dependent Claim
85 words
A photovoltaic solar cell having a layered structure comprising in order, a transparent electrical contact, an optically transparent window layer, a gallium arsenide absorber-generator layer, a gallium arsenide collector-converter layer, wherein the absorber-generator and the collector-converter layers respectively are doped to provide opposite conductivity types, and an optically opaque electrically conductive layer, wherein the optically transparent window layer is gallium arsenide phosphide graded from a phosphorus-rich portion in contact with transparent electrical contact and an arsenic-rich portion in contact with the gallium arsenide absorber-generator layer.
References Cited (Backward Citations)
US3565702A
Cited
US3675026A
Cited
US3993506A
Cited
US4107723A
Cited
US4179308A
Cited
US4404421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |