Anion-controlled Aggregation of a Porphyrin at Solid–Liquid Interfaces: A Distinguished Effect of Different Aggregates in Dye-sensitized Solar Cells

Abstract

Abstract Simultaneous formation of H- and J-type aggregates of meso-tetrakis(4-sulfonatophenyl)porphyrin diacid at the interfaces of nanocrystalline TiO2–electrolytes and the remarkable compositional change of the aggregates by varying the electrolyte anion are demonstrated. Dye-sensitized solar cell studies demonstrate much higher photon-to-electron conversion efficiency of the J-type aggregate than the H-type aggregate and substantially different performance depending on the type of electrolyte anion.