Platinum-Free Binary Co-Ni Alloy Counter Electrodes for Efficient Dye-Sensitized Solar Cells
Platinum-Free Binary Co-Ni Alloy Counter Electrodes for Efficient Dye-Sensitized Solar Cells
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DOI：
10.1002/anie.201406982
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发表时间：
2014-09-26
影响因子：
16.6
通讯作者：
Yu, Liangmin
中科院分区：
文献类型：
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作者：
Chen, Xiaoxu;Tang, Qunwei;Yu, Liangmin
染料敏化太阳能电池（DSSC）由于其在发展现代低碳经济的可再生能源技术中的应用而引起了越来越多的关注。然而，DSSC的商业应用受到铂（Pt）对电极（CE）的高成本的阻碍。在这里，我们使用无铂二元Co-Ni合金合成的温和的水热策略作为高效DSSC的CE材料。由于Co-Ni基DSSC具有快速的电荷转移、良好的导电性和合理的电催化作用，其能量转换效率高于纯Pt的CEs，且制备成本显著降低。基于CoNi0.25合金CE的DSSC显示出令人印象深刻的8.39%的功率转换效率，快速启动，多次启动/停止循环，以及在长时间照射下的良好稳定性。
Dye-sensitized solar cells (DSSCs) have attracted growing interest because of their application in renewable energy technologies in developing modern low-carbon economies. However, the commercial application of DSSCs has been hindered by the high expenses of platinum (Pt) counter electrodes (CEs). Here we use Pt-free binary Co-Ni alloys synthesized by a mild hydrothermal strategy as CE materials in efficient DSSCs. As a result of the rapid charge transfer, good electrical conduction, and reasonable electrocatalysis, the power conversion efficiencies of Co-Ni-based DSSCs are higher than those of Pt-only CEs, and the fabrication expense is markedly reduced. The DSSCs based on a CoNi0.25 alloy CE displays an impressive power conversion efficiency of 8.39%, fast start-up, multiple start/stop cycling, and good stability under extended irradiation.