Silicon solar cell

US9397248B2 · kind B2 · utility

Assignee

• KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY · KR

Inventors

• JungWook LIM · Daejeon, KR
• Sun Jin YUN · Daejeon, KR
• Seong Hyun LEE · Daejeon, KR

Key dates

• Filing date: May 30, 2014
• Grant date: Jul 19, 2016
• Expiry date: Sep 2, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/548

Abstract

A solar cell includes a first electrode; a lower light absorption layer disposed on the first electrode; an upper light absorption layer disposed on the lower light absorption layer; and an intermediate reflector layer provided between the lower light absorption layer and the upper light absorption layer, the intermediate reflector layer being comprised of copper oxide. The intermediate reflector layer includes a plurality of copper oxide layers including a lower copper oxide layer making contact with the lower light absorption layer, an upper copper oxide layer making contact with the upper light absorption layer, and an intermediate copper oxide layer provided between the lower copper oxide layer and the upper copper oxide layer. The plurality of copper oxide layers have respective oxygen amounts that gradually increase from the upper copper oxide layer to the lower copper oxide layer.