Solar cell

US9548405B2 · kind B2 · utility

Assignee

• Q-CELLS SE · DE

Inventors

• Peter Engelhart · Zörbig, DE
• Sven Wanka · Leipzig, DE
• Wilhelmus Mathijs Marie Kessels · Tilburg, NL
• Gijs Dingemans · Tilburg, NL

Key dates

• Filing date: Dec 16, 2009
• Grant date: Jan 17, 2017
• Expiry date: Dec 16, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/50

Abstract

A solar cell includes a semiconductor layer, a collecting layer for collecting free charge carriers from the semiconductor layer and a buffer layer which is arranged between the semiconductor layer and the collecting layer. The buffer layer is designed as a tunnel contact between the semiconductor layer and the collecting layer. The buffer layer essentially includes a material with a surface charge density of at least 1012 cm−2, preferably of at least 5×1012 cm−2, and more preferably of at least 1013 cm−2.