US4371740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive elements for photovoltaic cells
Assignee: Eastman Kodak Co
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Filing: 1982-02-16
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Granted: 1983-02-01
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Expires: 2002-02-16
Abstract
Abstract A conductive element such as an electrode useful in photovoltaic cells comprises a soda-lime glass support having thereon a layer containing polycrystalline SnO2 and a fluorine dopant, said conductive electrode being substantially haze-free and having a transmittance of radiation between 400 and 800 nm greater than 70% and an electrical resistance less than 30 ohm per square. The conductive element is particularly useful in thin film cadmium sulfide/cadmium telluride photovoltaic cells.
Inventors
- 👤 Katherine V. Clem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:56
CPC Classifications
C; C01; C01G; C01G19/00; C01G19/02; H; H10; H10F; H10F71/00; H10F71/138; H10F77/00; H10F77/20; H10F77/244; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
A conductive element comprising a soda-lime glass support having directly thereon a layer containing polycrystalline SnO 2 and from about 0.001 to about 5 weight percent of a fluorine-containing dopant, said conductive element being substantially haze-free and having a total transmittance to radiation between 400 and 800 nm greater than 70% and an electrical resistance less than 30 ohm/square.
Claim 2
Dependent Claim
59 words
A conductive element comprising a soda-lime glass support having directly thereon a layer containing polycrystalline SnO 2 and from about 0.001 to about 5 weight percent of a fluorine-containing dopant, said conductive element being substantially haze-free and having a total transmittance to radiation between 400 and 800 nm greater than 70% and an electrical resistance less than 30 ohm/square.
Claim 3
Dependent Claim
21 words
The conductive element of claim 1 wherein the fluorine-containing dopant is selected from the group consisting of SnF 2 and SnFCl.
Claim 4
Dependent Claim
19 words
The conductive element of claim 1 wherein the thickness of the layer is from 1000 A to 10,000 A.
Claim 5
Dependent Claim
24 words
The conductive element of claim 1 wherein the polycrystalline SnO 2 has (200) and (110) planes that are oriented parallel to the glass surface.
Claim 6
Dependent Claim
28 words
A photovoltaic cell comprising contiguous crystalline semiconductive layers and the conductive element of claim 1 in operative, low-impedance contact with at least part of one of said layers.
Claim 7
Dependent Claim
21 words
The photovoltaic cell of claim 5 wherein the fluorine-containing dopant is selected from the group consisting of SnF 2 and SnFCl.
Claim 8
Dependent Claim
43 words
A photovoltaic cell comprising first and second contiguous crystalline layers containing, respectively, p-type cadmium telluride and n-type cadmium sulfide and the conductive element of claim 1 in operative, low-impedance contact with at least part of said first or second layer of said cell.
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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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |