Development of D–π–A dyes with a pyrazine ring as an electron-withdrawing anchoring group for dye-sensitized solar cells

Abstract

D–π–A and (D–π–)₂A fluorescent dyes (OUK-1 and OUK-2) with a pyrazine ring as an electron-withdrawing anchoring group capable of forming a hydrogen bond or a pyrazinium ion at the Brønsted acid sites on TiO₂ surface have been developed as a new type of D–π–A dye sensitizer for dye-sensitized solar cells.