Process for preparing thieno3,4-B pyrazine copolymers,thieno3,4-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.