V2O3@C Catalyst Prepared by Pyrolysis of Polyoxovanadate Along Temperature Gradient and Used as Counter Electrode of Dye-sensitized Solar Cell
The precursors of catalysts were prepared by solvothermal method using polyoxovanadate as V source and ethylene glycol as C source.When the precursors were pyrolysed along the temperature gradi-ent of 500,600,700,800,900 ℃,five V2O3@C composites with different compositions and morphologies were obtained and used as counter electrodes of dye-sensitised solar cells(DSSCs),respectively.The results showed that the V2O3@C composites prepared at 700 ℃ had the best electrocatalytic performance and the highest power conversion efficiency(PCE)of 5.57％among them.This is attributed to the synergistic inter-action between V2O3 and C,which enhances the conductivity of the catalyst and increases the specific sur-face area of the material to generate a large number of catalytically active sites.
polyoxovanadatesolvothermal methoddye-sensitized solar cellcounter electrode
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