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US4256544A
Expired / Lapsed
US
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Method of making metal-chalcogenide photosensitive devices
Assignee: AT&T Inc
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Filing: 1980-04-04
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Granted: 1981-03-17
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Expires: 2000-04-04
Abstract
Abstract We have found that a photoactive metal selenide film, such as CdSe, may be formed by cathodic eletrodeposition from a seleno-sulfite (SeSO 3 2- ) solution without the need for a subsequent heat treating step which, it is hypothesized, was required by the simultaneous deposition of elemental selenium.
Inventors
- 👤 Maria S. Kazacos
- 👤 Barry Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:57
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01G; H01G9/00; H01G9/20; H01M14/00; H01M14/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
A method of making a device having a photosensitive metal selenide film comprising the steps of: forming a selenium and metal containing aqueous solution; and cathodically depositing the metal selenide on a conductive substrate in said solution characterized in that said selenium containing solution comprises an aqueous solution of SeSO 3 -2 .
Claim 2
Independent Claim
53 words
A method of making a device having a photosensitive metal selenide film comprising the steps of: forming a selenium and metal containing aqueous solution; and cathodically depositing the metal selenide on a conductive substrate in said solution characterized in that said selenium containing solution comprises an aqueous solution of SeSO 3 -2 .
Claim 3
Dependent Claim
16 words
A method as recited in claim 1 in which said solution further comprises a complexing agent.
Claim 4
Dependent Claim
14 words
A method as recited in claim 2 in which said agent is ethylenediaminetetraacetic acid.
Claim 5
Dependent Claim
27 words
A method as recited in claim 3 in which said forming step comprises the steps of dissolving selenium and Na 2 SO 3 in an aqueous buffer.
Claim 6
Dependent Claim
18 words
A method as recited in claim 4 in which said buffer comprises NH 3 /NH 4 + .
Claim 7
Dependent Claim
18 words
A method as recited in claim 5 in which said solution has a pH of at least 7.
Claim 8
Dependent Claim
13 words
A method as recited in claim 3 in which said metal is cadmium.
Claim 9
Dependent Claim
21 words
A method as recited in claim 1 in which said SeSO 3 -2 has a concentration of at least 5 mM.
Claim 10
Dependent Claim
32 words
A method as recited in claim 1 or 7 comprising the further steps of assembling said substrate coated with said metal selenide film, a counterelectrode and an electrolyte in an electrolytic cell.
Claim 11
Dependent Claim
26 words
A method as recited in claim 9 in which said electrolyte comprises a redox couple selected from the group consisting of selenide, sulfide and telluride anions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |