Method and device for cadmium-free solar cells
US8628997B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2011 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Mar 8, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/547
Abstract
A method for fabricating a thin film photovoltaic device is provided. The method includes providing a substrate comprising a thin film photovoltaic absorber which has a surface including copper, indium, gallium, selenium, and sulfur. The method further includes subjecting the surface to a material containing at least a zinc species substantially free of any cadmium. The surface is heated to cause formation of a zinc doped material. The zinc doped material is free from cadmium. Furthermore the method includes forming a zinc oxide material overlying the zinc doped material and forming a transparent conductive material overlying the zinc oxide material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.