Process for preparing thieno[3,4-B] pyrazine copolymers,thieno[3,4-B]—pyrazine copolymers prepared by this process, and their use

US8217136B2 · kind B2 · utility

Assignees

• Thüringisches Institute für Textile—und Kunstostoff-Forschung e. V. · DE
• Friedrich-Schiller-Universitat Jena · DE

Inventors

• Steffi Sensfuss · Jena, DE
• Maher Al Ibrahim · Ilmenau, DE
• Lars Blankenburg · Kahla, DE
• Elisabeth Klemm · Weimar, DE
• Raja Shahid Ashraf · Eindhoven, NL
• Munazza Shahid · Eindhoven, NL

Key dates

• Filing date: Mar 22, 2007
• Grant date: Jul 10, 2012
• Expiry date: Mar 2, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/549
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

New thieno[3,4-b]pyrazine copolymers are prepared by reacting 5,7-functionalized thieno[3,4-b]pyrazines with substituted aromatics in the presence of solvents, bases and polymerization catalysts, the copolymers thus prepared being employed preferably in the production of photovoltaic cells.