A new fluoropyrido[3,4-b]pyrazine based polymer for efficient photovoltaics

In order to improve the photovoltaic performance of pyrido[3,4-b] pyrazine (PP)-based polymers, a new fluoropyrido[3,4-b] pyrazine based D-A type polymer (BDT-S-fPP) was synthesized. The optical, electro-chemical and photovoltaic properties were well investigated. A power conversion efficiency (PCE) over 6.0% with a single junction device was obtained, which is the highest PCE among the PP-based polymers reported to date.