US4055442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon solar cell construction having two layer anti-reflection coating
Assignee: Applied Solar Energy Corp
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Filing: 1976-01-19
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Granted: 1977-10-25
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Expires: 1996-01-19
Abstract
Abstract Silicon solar cell construction having a two layer anti-reflection coating overlying the silicon cell and being disposed between the silicon solar cell and the cement which is utilized for securing the silicon solar cell cover to the silicon solar cell.
Inventors
- 👤 Frederick K. Crosher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:54
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F77/306; H10F77/311; H10F77/315; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
In a silicon solar cell construction, a body formed essentially of silicon having a surface with a photovoltaic junction applied thereon, an anti-reflection coating formed on said surface, a transparent protective cover and a layer of substantially transparent cement securing said protective cover to said anti-reflection coating and to said body, said cover and said cement having indices of refraction of approximately 1.45, and approximately 1.4, respectively, said anti-reflection coating being formed of first and second layers, said first layer being formed of material having a high index of refraction which is less than that of silicon ranging from 2.35 to 2.4 and being closer to said silicon body than said second layer said second layer being formed of a material having a low index of refraction which is greater than that of the cement but less than that of said first layer ranging from 1.6 to 1.7.
Claim 2
Dependent Claim
148 words
In a silicon solar cell construction, a body formed essentially of silicon having a surface with a photovoltaic junction applied thereon, an anti-reflection coating formed on said surface, a transparent protective cover and a layer of substantially transparent cement securing said protective cover to said anti-reflection coating and to said body, said cover and said cement having indices of refraction of approximately 1.45, and approximately 1.4, respectively, said anti-reflection coating being formed of first and second layers, said first layer being formed of material having a high index of refraction which is less than that of silicon ranging from 2.35 to 2.4 and being closer to said silicon body than said second layer said second layer being formed of a material having a low index of refraction which is greater than that of the cement but less than that of said first layer ranging from 1.6 to 1.7.
Claim 3
Dependent Claim
30 words
A silicon solar cell construction as in claim 1 wherein said high index material is an oxide of titanium and wherein said low index material is an oxide of aluminum.
Claim 4
Dependent Claim
28 words
A solar cell construction as in claim 2 wherein said anti-reflection coating has a reflectivity of less than 3% in the range of 650 nanometers to 1,000 nanometers.
References Cited (Backward Citations)
US3539883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |