Push–pull type alkoxy-wrapped N-annulated perylenes for dye-sensitized solar cells

Abstract

Three push–pull type, alkoxy-wrapped N-annulated perylene based sensitizers with different electron-accepting moieties were designed and synthesized. All the three dyes exhibited broad and intense absorption in the visible region. Co(II)/(III) based dye-sensitized solar cells showed overall power conversion efficiencies up to 8.38% for QB5 under the 100 mW cm⁻², simulated AM1.5G sunlight. The detailed optical, electrochemical, photovoltaic measurements and theoretic calculations were conducted and discussed to understand the relationship between the structure and properties.