Copolymers of alkoxythiophene

US8530594B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Qibing Pei · Fremont, US
• Yang Yang · Parsippany, US
• Chenjun Shi · El Monte, US

Key dates

• Filing date: Sep 15, 2008
• Grant date: Sep 10, 2013
• Expiry date: Apr 18, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G61/123
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The synthesis, characterization, optical and electrochemical properties of a regioregular copolymer, poly(3-octylthiophene-2,5-diyl-co-3-decyloxythiophene-2,5-diyl) (POT-co-DOT), and an alternating regioregular copolymer poly{(9,9-dioctylfluorene)-2,7-diyl-alt-[4,7-bis(3-decyloxythien-2-yl)-2,1,3-benzothiadiazole]-5′,5″-diyl} (PF-co-DTB) is disclosed. The incorporation of 3-alkoxythiophene units onto the conjugated backbones enhances the electron-donating property of the polymer and lowers its bandgap. The fabrication and performance of photovoltaic cells with bulk heterojunction architecture based on blends of these copolymers with PCBM are also described.