Solar cell with improved printed contact and method of making the same
US4105471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Jun 8, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/50
Abstract
A silicon solar cell having a body of boron doped P-type silicon material with a shallow P/N junction formed therein through diffusion of phosphorous into one surface thereof. A contact pattern of conductive material is formed on the surface of the solar cell in which the P/N junction is formed. The pattern is formed by first depositing a metallic layer upon the entire surface of the body and then applying the contact pattern by printing upon the surface of the metal. The metal has a characteristic such that when heated in the presence of oxygen to an appropriate temperature to fire the conductive material, it oxidizes and forms an anti-reflective layer on the surface of the cell except in those areas where the printed contact pattern is disposed. In the areas of the printed contact pattern the metal forms an ohmic contact between the surface of the silicon and the printed contact pattern and provides a barrier to preclude the conductive contact pattern material from punching through the shallow P/N junction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.