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Size-controllable synthesis of NiCoSe2 microspheres as a counter electrode for dye-sensitized solar cells

机译：尼古罗斯2微球的尺寸可控合成作为染料敏化太阳能电池的对电极

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摘要

NiCoSe2 microspheres have been successfully synthesized by a facile one-step hydrothermal method at different hydrothermal temperatures. The prepared samples are divided according to their reaction temperatures (90, 120, 150 and 180 degrees C) and named NiCoSe2-90, NiCoSe2-120, NiCoSe2-150 and NiCoSe2-180, respectively. The diameters of the NiCoSe2 microspheres strongly depend on the different hydrothermal temperatures. When the temperature is increased to 150 degrees C, the size of the resultant NiCoSe2 microspheres changes from 200 to 800 nm, and the interior of NiCoSe2-150 possesses a flocculent structure. However, NiCoSe2-180 displays a cauliflower-like aggregated structure. The prepared NiCoSe2 alloys are used as high-performance Pt-free counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). Cyclic voltammogram measurement indicates that NiCoSe2-150 CE has larger current density than Pt CE. Electrochemical impedance spectroscopy shows that NiCoSe2-150 CE has a low charge-transfer resistance of 1.8 Omega cm(2). Due to their unique morphologies and well-defined interior and exterior structures, DSSCs based on NiCoSe2-120 and NiCoSe2-150 CEs achieve high power conversion efficiencies of 8.48% and 8.76%, respectively, which are higher than that of the solar cell based on Pt CE (8.31%).
机译：在不同的水热温度下，通过容易的一步水热法成功地合成了尼古罗2微球。将制备的样品根据其反应温度（90,120,150和180℃）分别分别分别分别分别为Nicose2-90，Nicose2-120，Nicose2-150和Nicose2-180。尼古罗斯2微球的直径强烈取决于不同的水热温度。当温度升至150℃时，所得伐奈2微球的尺寸从200到800nm变化，尼古罗斯2-150的内部具有絮凝结构。然而，Nicose2-180显示了花椰菜状的聚集结构。制备的尼古罗斯2合金用作染料敏化太阳能电池（DSSCs）的高性能Pt的反电极（CES）。循环伏安图测量表明Nicose2-150 CE具有比PT CE更大的电流密度。电化学阻抗光谱表明，Nicose2-150 Ce具有1.8ωcm（2）的低电荷转移电阻。由于它们独特的形态和明确定义的内部和外部结构，基于Nicose2-120和Nicose2-150 Ces的DSSC分别实现了8.48％和8.76％的高功率转换效率，其基于太阳能电池的高功率转换效率为8.48％和8.76％ PT CE（8.31％）。

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  • 来源
    《RSC Advances》 |2018年第46期|共9页
  • 作者

    Chen Xiaobo; Ding Jingguo; Li Yan; Wu Yinxia; Zhuang Guoce; Zhang Cuicui; Zhang Zhihai; Zhu Chengyun; Yang Peizhi;

  • 作者单位

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yunnan Normal Univ Inst Solar Energy Minist Adv Tech &

    Preparat Renewable Energy Mat Key Lab Educ Kunming 650500 Yunnan Peoples R China;

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