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首页> 外文期刊>RSC Advances >Preparation of CoS2 nanoflake arrays through ion exchange reaction of Co(OH)(2) and their application as counter electrodes for dye-sensitized solar cells
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Preparation of CoS2 nanoflake arrays through ion exchange reaction of Co(OH)(2) and their application as counter electrodes for dye-sensitized solar cells

机译：通过Co（OH）（2）的离子交换反应制备CoS2纳米片阵列及其在染料敏化太阳能电池对电极中的应用

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摘要

The cobalt sulfide nanoflake arrays prepared by the transformation of Co(OH)(2) nanoflake arrays using the ion exchange reaction method were incorporated into Pt-free dye-sensitized solar cells (DSSCs). Morphologies and crystal structures of the cobalt sulfide and cobalt hydroxide nanoflakes arrays were characterized by SEM, TEM and XRD analyses. The electrochemical properties were determined by cyclic voltammetry (CV) measurement. The cobalt sulfide nanoflakes which were composed of CoS2 single crystals and their aggregates dispersing in the amorphous cobalt sulfide matrix were completely transferred by substitution of S2- for O2- in the ion exchange reaction. The DSSC assembled with cobalt sulfide nanoflake arrays as the counter electrode showed a photovoltaic conversion efficiency of 5.20%, which was close to that of DSSC with sputtered Pt as the counter electrode (5.34%). Therefore, the cobalt sulfide nanoflake array film can be considered as a promising alternative counter electrode for use in DSSCs due to its large surface area and high electrocatalytic performance.
机译：通过使用离子交换反应方法转化Co（OH）（2）纳米片阵列而制备的硫化钴纳米片阵列被并入无Pt染料敏化太阳能电池（DSSC）中。通过SEM，TEM和XRD分析表征了硫化钴和氢氧化钴纳米薄片阵列的形貌和晶体结构。电化学性质通过循环伏安法（CV）测量来确定。由CoS2单晶组成的硫化钴纳米薄片及其聚集体分散在无定形硫化钴基质中，通过S2-取代O2-在离子交换反应中完全转移。用硫化钴纳米薄片阵列作为对电极组装的DSSC显示出5.20％的光电转换效率，接近以溅射的Pt作为对电极的DSSC的光电转换效率（5.34％）。因此，硫化钴纳米薄片阵列膜由于其较大的表面积和较高的电催化性能，可以被认为是用于DSSC的有希望的替代对电极。

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