Abstract
Kesterite Cu2ZnSnS4 (CZTS) wide application is hindered by poor electrical conductivity, although it is a promising counter electrode (CE) material for dye-sensitized solar cells (DSSCs), due to its excellent catalytic activity, hierarchical microstructure, and natural abundance. Inspired by the advantages of flexible carbon cloth, with high conductivity and expanded surface area, we designed and fabricated single-crystal CZTS nanoplate arrays (NPLAr) on flexible carbon cloth as DSSCs cathode directly, demonstrating a power conversion efficiency of 7.53% and a long-operation life performance. The outstanding performance was ascribed from the high catalytic activity, good conductive framework, effective photo-generated electron migration, and high iodide species diffusion rate of the composite CE. Our present results demonstrate that the novel and flexible CZTS/Carbon Cloth composite structure is an alternative and high-efficiency Pt-free counter electrode in dye-sensitized solar cells.
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