One‐pot Synthesis of CZTS/RGO Composite Material and its Electro‐Catalytic Performance towards Triiodide Reduction in Dye‐Sensitized Solar Cells

Abstract

The composite material of quaternary kesterite type Cu 2 ZnSnS 4 and reduced graphene oxide (CZTS/RGO) was successfully synthesized by a one-pot hydrothermal synthesis method. When applied as counter electrode materials for dye-sensitized solar cells, it shows better electro-catalytic performance towards reduction of triiodide. The DSSCs based on CZTS/RGO counter electrode shows a maximum solar-to-electrical power efficiency of 3.08%, which is much higher than that of pure CZTS counter electrode (1.41%) and pure RGO counter electrode (1.55%) prepared under the same conditions. The weight percent of GO to CZTS raw material used to synthesize CZTS/RGO is an important factors to affect the photovoltaic performance of DSSCs based on CZTS/RGO counter electrode. It is believed that as-synthesized CZTS/RGO can potentially be used as alternative counter electrode materials to replace the expensive Pt counter electrode, and this one-pot synthetic method will be helpful for exploring facile synthetic route of low-cost and efficient CZTS based composite counter electrode materials.[a] Dr.

ZnO/Ti3C2T x composite photoanodes for efficient dye-sensitized solar cells

“…For instance, graphene, with its excellent conductivity, can reduce charge recombination. Additionally, 2D MoS 2 induced photoanodes have been found to promote efficient electron transfer [20][21][22][23].…”