Organic dyes containing dithieno[2,3-d:2′,3′-d′]thieno[3,2-b:3′,2′-b′]dipyrrole core for efficient dye-sensitized solar cells

Abstract

We report two new triarylamine-cyanoacrylic acid based push–pull dyes, <bold>X76</bold> and <bold>X77</bold>, featuring the π-conjugated linkers of dihexyl- and dihexyloxybenzene-substituted dithieno[2,3-<italic>d</italic>:2′,3′-<italic>d</italic>′]thieno[3,2-<italic>b</italic>:3′,2′-<italic>b</italic>′]dipyrrole (DTDP), respectively.