The design of organic wide-bandgap dyes for dye-sensitized solar cells (DSCs) can have many applications in energy production and storage. Our group recently published a wide-bandgap organic dye (RR9) with electron deficient building block benzothiadiazole as the π-bridge to access more positive potentials. Devices with RR9 paired with Fe(bpy)33+/2+ gave a record-setting voltage of 1.42 V for single junction DSC devices. In this work, the electron deficient thienopyrroledione building block was used as a π-bridge combined with weak aryl-ether donor groups and the phenyl-cyanoacetic acid acceptor group. A variety of donor groups were employed and extensively studied using UV-vis absorption spectroscopy and cyclic voltammetry, both in solution and on TiO2 films. The thienopyrroledione-based dye DSC devices paired with Fe(bpy)33+/2+ are capable of generating high voltage DSC devices &gt;1.3 V.

Thienopyrroledione-based photosensitizers as strong photoinduced oxidants: Oxidation of Fe(bpy)32+ in a >1.3 V dye-sensitized solar cell

2019 Fall National Meeting

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