Solar cell with reduced absorber thickness and reduced back surface recombination

US10283653B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Hans-Juergen Eickelmann · Mainz, DE
• Michael Haag · Boulder, US
• Ruediger Kellmann · Mainz, DE
• Markus Schmidt · Seibersbach, DE
• Johannes Windeln · Bodenheim, DE

Key dates

• Filing date: Mar 3, 2017
• Grant date: May 7, 2019
• Expiry date: Jun 23, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50

Abstract

A stacked-layered thin film solar cell. The solar cell has reduced absorber thickness and an improved back contact for Copper Indium Gallium Selenide solar cells. The back contact provides improved reflectance particularly for infrared wavelengths while still maintaining ohmic contact to the semiconductor absorber. This reflectance is achieved by producing a back contact having a highly reflecting metal separated from an absorbing layer with a dielectric layer.