Enhanced bulk heterojunction devices prepared by thermal and solvent vapor annealing processes

US9768402B2 · kind B2 · utility

Assignees

• University of Southern California · US
• THE REGENTS OF THE UNIVERSITY OF MICHIGAN · US

Inventors

• Stephen R. Forrest · Ann Arbor, US
• Mark E. Thompson · Villa Park, US
• Guodan Wei · Ann Arbor, US
• Siyi Wang · Hillsboro, US

Key dates

• Filing date: Apr 6, 2011
• Grant date: Sep 19, 2017
• Expiry date: Apr 6, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/549

Abstract

A method of preparing a bulk heterojunction organic photovoltaic cell through combinations of thermal and solvent vapor annealing are described. Bulk heterojunction films may prepared by known methods such as spin coating, and then exposed to one or more vaporized solvents and thermally annealed in an effort to enhance the crystalline nature of the photoactive materials.