Solar cell with chalcopyrite absorber layer

US5626688A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Volker Probst · Berlin, DE
• Joerk Rimmasch · Munich, DE
• Hauke Harms · Munich, DE

Key dates

• Filing date: Dec 1, 1995
• Grant date: May 6, 1997
• Expiry date: Dec 1, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/541

Abstract

A substrate-independent manufacturing method for a solar cell with chalcopyrite absorber layer (4, 5) is proposed wherein a desired alkali content is obtained in the finished absorber layer by dosed addition of Na, K, or Li during the manufacturing process. An additional drive-in of alkali ions from a potentially alkali-containing substrate (1) is prevented by providing a diffusion barrier layer (2) between substrate and absorber layer.