A Reusable N-Doped-Carbon-Coated Mo2 C Composite Counter Electrode for High-Efficiency Dye-Sensitized Solar Cells.
A Reusable N-Doped-Carbon-Coated Mo2 C Composite Counter Electrode for High-Efficiency Dye-Sensitized Solar Cells.
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DOI：
10.1002/chem.201703519
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发表时间：
2017-12
期刊：
影响因子：
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通讯作者：
Ting Wang;Jiabo Wang;Weilin Chen;Xiaotao Zheng;E. Wang
中科院分区：
文献类型：
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作者：
Ting Wang;Jiabo Wang;Weilin Chen;Xiaotao Zheng;E. Wang
设计和开发高效、稳定的非贵金属基催化剂用于染料敏化太阳能电池（DSSC）的对电极（CE）已经受到了极大的关注。在这项工作中，碳化钼纳米颗粒均匀分布在富氮碳基体（Mo 2 C@NC）已合成廉价的原料（聚氧乙烯酸盐和双氰胺）通过一个简单的一步固相合成方法。新型Mo 2 C@NC杂化物不仅可用作DSSC中的CE，而且作为氧化还原电解质对I3- /I-显示出上级催化活性。以Mo 2 C@NC作为CE的DSSC的功率转换效率高达6.49%，与Pt的功率转换效率（6.38%）相当。通过滴涂法制备CE，而不添加另一种导电聚合物。最重要的是，该方法避免了样品从掺氟氧化锡（FTO）上脱落的问题，并且CE可以重复使用而效率不变。这为开发成本低、工艺简单、稳定性好、效率高的无铂催化剂开辟了道路。
The design and development of efficient and stable nonprecious-metal-based catalysts for counter electrodes (CEs) in dye-sensitized solar cells (DSSCs) has received a great deal of attention. In this work, molybdenum carbide nanoparticles homogeneously distributed in a nitrogen-rich carbon matrix (Mo2 C@NC) have been synthesized from inexpensive raw materials (polyoxometalate and dicyandiamide) by a facile one-step solid-phase synthesis method. The novel Mo2 C@NC hybrid was not only used as a CE in a DSSC, but also showed superior catalytic activity towards I3- /I- as a redox electrolyte. The power conversion efficiency of a DSSC with Mo2 C@NC as the CE was as high as 6.49 %, comparable to that with Pt (6.38 %). The CE was prepared by a drop-coating method, without the addition of another conductive polymer. Most importantly, the method circumvents the problem of the sample falling off from the fluorine-doped tin oxide (FTO), and the CE could be repeatedly reused with unchanged efficiency. Therefore, it opens the way for the development of platinum-free catalysts with low cost, simple processing, good stability, and high efficiency.