Multi-junction photovoltaic cell having buffer layers for the growth of single crystal boron compounds

US7122733B2 · kind B2 · utility

Assignee

• The Boeing Company · US

Inventors

• Authi A. Narayanan · Thousand Oaks, US
• Joel Schwartz · Brooklyn, US

Key dates

• Filing date: Sep 6, 2002
• Grant date: Oct 17, 2006
• Expiry date: Jun 22, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/544

Abstract

The present invention provides a solar cell comprising a substrate, a first buffer layer disposed above the base layer, a second buffer layer disposed above the first buffer layer, a first boron compound layer disposed above the second buffer layer, a second boron compound layer disposed above the first compound layer, and a window layer disposed above the second compound layer, wherein the first compound layer comprises a first type of doping, wherein the second compound layer comprises a second type of doping, wherein the second buffer layer comprises a higher energy bandgap than the first compound layer, and wherein the first buffer layer and the second buffer layer permit a boron content in the first compound layer and the second compound layer to be greater than 3 %.