Electrocatalytic properties of iron chalcogenides as low-cost counter electrode materials for dye-sensitized solar cells

Three iron chalcogenides were successfully prepared and tested as CE materials in DSSCs. The devices using FeS₂, FeSe₂ and FeTe₂ obtained high photovoltaic conversion efficiencies of 8.00, 7.92 and 7.21%, respectively, which were also confirmed by theoretical calculations.