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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >In situ grown cobalt selenide/graphene nanocomposite counter electrodes for enhanced dye-sensitized solar cell performance
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In situ grown cobalt selenide/graphene nanocomposite counter electrodes for enhanced dye-sensitized solar cell performance

机译：原位生长的钴硒化醇/石墨烯纳米复合反应电极，用于增强染料敏化太阳能电池性能

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Graphene nanocomposites were prepared by in situ hydrothermally growing CoSe nanoparticles on different amounts of graphene nanosheets (GNs). The influence of graphene content on the physical and electrochemical properties of CoSe was studied. The CoSe nanoparticles with high catalytic activity accelerated the reduction of triiodide, while the graphene facilitated charge transport during the catalytic process. The CoSe/GN(0.50) displayed the highest catalytic activity due to its lowest charge transfer resistance. With increasing the graphene content beyond the optimum concentration, restacking of graphene caused a decreased electrocatalytic activity of CoSe/GN nanohybrids. The DSSCs fabricated with CoSe/GN(0.50) as the CE exhibited 20% improvement in the photo-conversion efficiency (PCE) with respect to the standard Pt, much higher than using other reported binary metal selenides. This revealed that CoSe/GN(0.50) nanohybrids could be used as a promising alternative to platinum counter electrodes for DSSCs.
机译：通过在不同量的石墨烯纳米片（GNS）上以原位水热生长的含量纳米粒子制备石墨烯纳米复合材料。研究了石墨烯含量对皮尤物理和电化学性质的影响。具有高催化活性的皮脂纳米颗粒加速了三碘化物的还原，而石墨烯促进催化过程中的电荷输送。由于其最低电荷转移电阻，COSE / GN（0.50）显示出最高的催化活性。随着超出最佳浓度的石墨烯含量，石墨烯的折续率引起了COSE / GN纳米胺的电催化活性降低。用COSE / GN（0.50）制造的DSSCs作为CE的光转化效率（PCE）相对于标准PT显示出20％，远高于使用其他报告的二元金属硒化烷。这揭示了COSE / GN（0.50）纳米胺可以用作DSSCS的铂计数器电极的有希望的替代方案。

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