Process for Preparing Thieno[3,4-B] Pyrazine Copolymers,Thieno[3,4-B]- Pyrazine Copolymers Prepared by this Process, and their use

摘要

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.