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首页> 外文期刊>RSC Advances >High-performance dye-sensitized solar cells using Ag-doped CoS counter electrodes
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High-performance dye-sensitized solar cells using Ag-doped CoS counter electrodes

机译：使用掺银CoS对电极的高性能染料敏化太阳能电池

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摘要

CoS has been emerging as a promising Pt-free counter electrode (CE) material for dye-sensitized solar cells (DSSCs) due to its satisfactory electrocatalytic properties for redox reactions. However, its low electronic and ionic conductivities have limited its use in DSSCs. The doping of Ag with appropriate amount significantly improved the properties of CoS for application as a CE. Ag-doped CoS samples with various doping amounts were prepared by a facile one-step hydrothermal approach. There were very sharp changes of morphologies and particle sizes after doping different amounts of Ag. It is found that the DSSC fabricated with the 5% Ag-doped CoS CE achieved an impressive power-conversion efficiency (PCE) of 8.35% which was higher than that of the DSSC with a Pt CE (8.17%) by 2.2%, while the DSSC consisting of undoped CoS only exhibited a PCE of 6.93%. Such an enhanced PCE could be attributed to the significantly improved electrochemical activity and mixed conductivity resulting from the Ag dopant. Therefore, the excellent electrocatalytic activity, facile preparation and low material cost of the Ag-doped CoS electrode provide it with promising potential for large-scale production of new-generation DSSCs.
机译：由于CoS具有令人满意的氧化还原反应电催化性能，因此它已成为一种有希望的用于染料敏化太阳能电池（DSSC）的无铂对电极（CE）材料。但是，其低的电子和离子电导率限制了它在DSSC中的使用。适量的Ag掺杂显着改善了用作CE的CoS的性能。通过简便的一步水热法制备了具有各种掺杂量的Ag掺杂CoS样品。掺杂不同量的银后，形貌和粒径发生了非常急剧的变化。研究发现，掺有5％Ag的CoS CE制成的DSSC的功率转换效率（PCE）为8.35％，比具有Pt CE的DSSC（8.17％）的2.2％高，而由未掺杂的CoS组成的DSSC仅显示6.93％的PCE。这种增强的PCE可以归因于Ag掺杂剂显着改善的电化学活性和混合电导率。因此，Ag掺杂CoS电极优异的电催化活性，制备简便，材料成本低等特点使其具有大规模生产新一代DSSC的潜力。

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