ABSORBER SURFACE MODIFICATION

摘要

The present disclosure provides systems and methods for depositing an alkaline metal layer on an absorber to generate a copper-poor region at a surface of the absorber. The copper-poor region provides an increased efficiency over non-treated absorbers having copper-rich surfaces. The alkaline metal layer may be deposited by any suitable deposition method, such as, for example, a wet deposition method. After the alkaline metal layer is deposited, the absorber is annealed, causing the alkaline metal layer to interact with the absorber to reduce the copper-profile of the absorber at the interface between the alkaline metal layer and the absorber.

主权项

1. A method for forming a photovoltaic cell, comprising the steps of:
forming an absorber on a back electrode; depositing a material comprising an alkaline metal on a surface of the absorber; and annealing the absorber to reduce a copper content of the absorber at the surface.