Patent US4180625A successfully refreshed from Google Patents.
US4180625A
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Semiconductor liquid junction photocell using a CuInS2 electrode
Assignee: AT&T Inc
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Filing: 1978-08-21
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Granted: 1979-12-25
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Expires: 1998-08-21
Abstract
Abstract Liquid-semiconductor photocells have received much attention recently as candidates for use in solar power conversion devices. A semiconductor liquid junction photovoltaic cell having a photoactive electrode made from CuInS 2 and a liquid electrolyte containing a redox couple consisting of S 2 ═/S═ anions has been found to produce a stable photocurrent output.
Inventors
- 👤 Sigurd Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:46
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/20; H01M; H01M14/00; H01M14/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A photocell containing a photovoltaic junction between a semiconductor and a liquid electrolyte, said electrolyte containing a redox couple consisting of sulfide and polysulfide anions having a concentration of at least 0.1 molar; characterized in that said semiconductor consists essentially of n-type CuInS 2 .
Claim 2
Dependent Claim
45 words
A photocell containing a photovoltaic junction between a semiconductor and a liquid electrolyte, said electrolyte containing a redox couple consisting of sulfide and polysulfide anions having a concentration of at least 0.1 molar; characterized in that said semiconductor consists essentially of n-type CuInS 2 .
Claim 3
Dependent Claim
15 words
A photocell as recited in claim 1 in which said electrolyte is an aqueous electrolyte.
Claim 4
Dependent Claim
18 words
A photocell as recited in claim 2 in which said redox couple has a nominal one molar concentration.
Claim 5
Dependent Claim
18 words
A photocell as recited in claim 1 or 3 in which said CuInS 2 is doped with Cd.
Claim 6
Dependent Claim
21 words
A photocell as recited in claim 4 in which said Cd has a concentration less than 5×10 18 /cm 3 .
References Cited (Backward Citations)
US4011149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |