Patent US4121238A successfully refreshed from Google Patents.
US4121238A
Expired / Lapsed
US
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Metal oxide/indium phosphide devices
Assignee: AT&T Inc
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Filing: 1977-02-16
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Granted: 1978-10-17
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Expires: 1997-02-16
Abstract
Abstract Devices using a transparent conductive layer of indium oxide or indium tin oxide, and a layer of a direct gap semiconductor material have been found to operate as solar cells and as light emitting devices. Exemplary of such devices is an indium tin oxide/p-InP cell which shows a 12.5% solar power conversion efficiency and also emits a red colored light when biased.
Inventors
- 👤 Klaus Jurgen Bachmann
- 👤 Paul Herman Schmidt
- 👤 Edward Guerrant Spencer
- 👤 Karnamadakala Sreenivasaacharlu Sree Harsha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:56
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/16; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/811; H10H20/822; H10H20/824; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y10; Y10S; Y10S148/00; Y10S148/118; Y10S148/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
A device comprising a p-type direct gap semiconductor material in intimate contact with a conducting transparent material characterized in that said conducting transparent material is chosen from the group consisting of indium oxide, and indium tin oxide, and said p-type direct gap semiconductor material is p-type InP whereby a rectifying junction is formed.
Claim 2
Independent Claim
53 words
A device comprising a p-type direct gap semiconductor material in intimate contact with a conducting transparent material characterized in that said conducting transparent material is chosen from the group consisting of indium oxide, and indium tin oxide, and said p-type direct gap semiconductor material is p-type InP whereby a rectifying junction is formed.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein said conducting transparent material is made by the technique of ion beam sputter deposition.
Claim 4
Dependent Claim
12 words
The device of claim 1 wherein said conducting transparent material is amorphous.
Claim 5
Dependent Claim
12 words
The device of claim 1 wherein said conducting transparent material is polycrystalline.
Claim 6
Dependent Claim
11 words
The device of claim 1 wherein said p-type InP is polycrystalline.
Claim 7
Dependent Claim
15 words
The device of claim 1 including an antireflection coating deposited on said conducting transparent material.
Claim 8
Dependent Claim
16 words
The device of claim 1 wherein said p-type InP layer is a single crystal of InP.
Claim 9
Dependent Claim
24 words
The device of claim 7 wherein said conducting transparent material is in intimate contact with the 100 plane of said single crystal of InP.
Claim 10
Dependent Claim
18 words
The device of claim 1 wherein said conducting transparent material is made by the technique of Rf sputtering.
Claim 11
Independent Claim
51 words
A device comprising a conducting transparent material deposited on a p-type direct gap semiconductor material CHARACTERIZED IN THAT said conducting transparent material is chosen from the group consisting of indium oxide and indium tin oxide and said p-type direct gap semiconductor material is p-type InP whereby a rectifying junction is formed.
Claim 12
Independent Claim
51 words
A device comprising a conducting transparent material deposited on a p-type direct gap semiconductor material CHARACTERIZED IN THAT said conducting transparent material is chosen from the group consisting of indium oxide and indium tin oxide and said p-type direct gap semiconductor material is p-type InP whereby a rectifying junction is formed.
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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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |