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Balance of catalytic activity and conductivity of Cu 2 ZnSnS 4 /graphene counter electrode for dye-sensitized solar cells: using hydrothermal-synthesized kesterite Cu 2 ZnSnS 4 and graphene obtained by product line
Journal of Solid State Electrochemistry ( IF 2.6 ) Pub Date : 2020-01-17 , DOI: 10.1007/s10008-020-04493-6
Liguo Wei , Qinhang Wu , Wei Chen , Dong Wang , Bo Jiang , Gonglei Sun , Furong Yu , Jing Feng , Yulin Yang

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 Jsc of 13.24 mA cm−2, open-circuit photovoltage Voc 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.



中文翻译:

染料敏化太阳能电池用Cu 2 ZnSnS 4 /石墨烯对电极的催化活性和电导率的平衡:使用水热合成的钾长石,Cu 2 ZnSnS 4和由生产线获得的石墨烯

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。

更新日期:2020-01-17
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