Efficient dye-sensitized solar cells with CoSe/graphene composite counter electrodes
Efficient dye-sensitized solar cells with CoSe/graphene composite counter electrodes
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具有CoSe/石墨烯复合对电极的高效染料敏化太阳能电池
DOI：
10.1016/j.solener.2017.01.035
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发表时间：
2017-03-01
期刊：
影响因子：
6.7
通讯作者：
Yang, Peizhi
中科院分区：
文献类型：
--
作者：
Chen, Xiaobo;Yang, Qiming;Yang, Peizhi
采用低温水热法制备了不同石墨烯含量的CoSe/石墨烯纳米复合材料，并将其用作染料敏化太阳能电池（DSSC）的对电极。SEM显示CoSe 0. 85萨雷粒子自组装成马铃薯片状形貌并负载在石墨烯片上。循环伏安法、电化学阻抗谱和Tafel极化分析表明，石墨烯质量分数为75%的CoSe 0. 85/石墨烯复合电极对三碘离子还原为碘离子具有较高的电催化活性，且电极/电解质界面的电荷转移电阻较低.优化的CoSe0.85/石墨烯复合CE的DSSC产生的最大功率转换效率为8.17%，这是优于裸CoSe0.85 CE。(C)2017爱思唯尔有限公司版权所有
CoSe/graphene nanocomposites with various graphene content were synthesized via a simple low temperature hydrothermal method and used as counter electrode (CE) in dye sensitized solar cells (DSSC). SEM shows that CoSe0.85 particle sare self-assembled to a potato-chip-like morphology and loaded on graphene sheets. Cyclic voltammetry and electrochemical impedance spectroscopy and Tafel polarization analyses revealed that the CoSe0.85/graphene composite CE with the weight ratio of graphene of 75% exhibited higher electrocatalytic activity for the reduction of triiodide to iodide and lower charge transfer resistance at the CE/electrolyte interface than the other compositions. The DSSC with the optimized CoSe0.85/graphene as composite CE produces a maximum power conversion efficiency of 8.17%, which is better than bare CoSe0.85 CE. (C) 2017 Elsevier Ltd. All rights reserved.