[12p-N322-1~18] 12.5 Organic solar cells

▼ [12p-N322-5] Naphthobisthiadiazole-based semiconducting polymers for non-fullerene solar cell

〇(D)Lihui Chou¹, Tsubasa Mikie¹, Masahiko Saito¹, Itaru Osaka¹ (1.Hiroshima Univ.)

Keywords:polymer solar cell

Semiconducting polymers have received great attention in the field of organic electronics because of their potential of solution processability and mechanical properties. Organic solar cells that used semiconducting polymers have shown great advances during the past few decades. The strategy of constructing semiconducting polymers based on the donor (D) and acceptor (A) units has been widely adopted to tune the structures and optoelectronic properties. We have reported that semiconducting polymers based on naphthobisthiadiazole (NTz) electron-accepting unit show high efficiencies in fullerene solar cells. In this study, new NTz-based semiconducting polymers incorporating benzodithiophene (BDT) electron-donating units were designed and synthesized and applied to non-fullerene solar cells blended with a non-fullerene acceptor Y6. The impact of introducing fluorine or chlorine atoms on the thienyl side chain of the BDT moiety on the energetics, film structures, and photovoltaic performances in the solar cells are also investigated.