Substrate-free thin-film flexible photovoltaic device and fabrication method

US11183611B2 · kind B2 · utility

Assignees

• International Business Machines Corporation · US
• SOLAR FRONTIER K.K. · JP

Inventors

• Oki Gunawan · Westwood, US
• Homare Hiroi · Tokyo, JP
• Jeehwan Kim · White Plains, US
• David B. Mitzi · Campion Road, US
• Hiroki Sugimoto · Tokyo, JP

Key dates

• Filing date: Dec 3, 2019
• Grant date: Nov 23, 2021
• Expiry date: Feb 27, 2040

Classification

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

Abstract

A photovoltaic device includes an absorber layer having a back contact formed on the absorber layer, the back contact having an exposed surface free from a substrate. It further includes a top contact formed in contact with a transparent conductive layer opposite the back contact and a stressor layer forming a superstrate on the absorber layer opposite the back contact.