The catalytic activity and conductivity of Cu₂ZnSnS₄/graphene counter electrode for dye-sensitized solar cells (DSSCs) was balanced using hydrothermal-synthesized kesterite Cu₂ZnSnS₄ and graphene obtained by product line. It was found that the electrocatalytic activity of Cu₂ZnSnS₄/graphene counter electrode was adjustable by balancing its catalytic activity and conductivity using varied weight ratio of graphene in the composited material of Cu₂ZnSnS₄/graphene. When the weight percent of graphene was 2% to Cu₂ZnSnS₄, the catalytic activity and conductivity of Cu₂ZnSnS₄/graphene counter electrode came to the balanced point, resulting in the best electrocatalytic activity. Under the balanced conditions, the dye-sensitized solar cell devices based on Cu₂ZnSnS₄/graphene counter electrode show a maximum solar-to-electrical power efficiency of 3.71% (with short-circuit photocurrent density J_sc of 13.24 mA cm⁻², open-circuit photovoltage V_oc of 0.63 V, and fill factor FF of 0.44), which is higher than that of unbalanced counter electrode. Although the photovoltaic performance of DSSCs based on Cu₂ZnSnS₄/graphene counter electrode was a little lower than that of DSSCs based on platinum (Pt) counter electrode (4.95%), it is believed that Cu₂ZnSnS₄/graphene counter electrode would outperform Pt counter electrode by further balancing its catalytic activity and conductivity using higher-quality and more matched Cu₂ZnSnS₄ and graphene. This strategy to improve the electrocatalytic activity of counter electrode will be helpful for exploring facile synthesis, low-cost, and efficient Cu₂ZnSnS₄-based composited counter electrode materials.

使用水热合成的钾长石沸石Cu ₂ ZnSnS ₄和通过生产线获得的石墨烯来平衡用于染料敏化太阳能电池（DSSCs）的Cu ₂ ZnSnS ₄ /石墨烯对电极的催化活性和电导率。发现通过改变石墨烯在Cu ₂ ZnSnS ₄ /石墨烯的复合材料中的重量比，可以通过平衡其催化活性和导电性来调节Cu ₂ ZnSnS ₄ /石墨烯对电极的电催化活性。当石墨烯的重量百分比为2％至铜_2个ZnSnS ₄，Cu的催化活性和电导率₂ZnSnS ₄ /石墨烯对电极达到平衡点，具有最佳的电催化活性。在平衡条件下，基于Cu ₂ ZnSnS ₄ /石墨烯对电极的染料敏化太阳能电池器件的最大太阳能电效率为3.71％（短路光电流密度J _sc为13.24 mA cm ^-2），开路光电压V _oc为0.63 V，填充系数FF为0.44），高于不平衡对电极。尽管基于Cu ₂ ZnSnS ₄的DSSCs的光伏性能/石墨烯对电极比基于铂（Pt）对电极的DSSC稍低（4.95％），据信Cu ₂ ZnSnS ₄ /石墨烯对电极通过进一步平衡其催化活性和电导率将优于Pt对电极使用更高质量和更匹配的Cu ₂ ZnSnS ₄和石墨烯。这种提高对电极的电催化活性的策略将有助于探索容易的合成，低成本和有效的基于Cu ₂ ZnSnS ₄的复合对电极材料。