Deng Jianping, Wang Minqiang, Song Xiaohui, Yang Zhi, Yuan Zhaolin
Shaanxi Key Laboratory of Industrial Automation, School of Physics and Telecommunication Engineering, Shaanxi University of Technology, Hanzhong 723001, China.
Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Nanomaterials (Basel). 2018 Apr 17;8(4):251. doi: 10.3390/nano8040251.
In this paper, a novel Ti porous film-supported NiCo₂S₄ nanotube was fabricated by the acid etching and two-step hydrothermal method and then used as a counter electrode in a CdS/CdSe quantum-dot-sensitized solar cell. Measurements of the cyclic voltammetry, Tafel polarization curves, and electrochemical impedance spectroscopy of the symmetric cells revealed that compared with the conventional FTO (fluorine doped tin oxide)/Pt counter electrode, Ti porous film-supported NiCo₂S₄ nanotubes counter electrode exhibited greater electrocatalytic activity toward polysulfide electrolyte and lower charge-transfer resistance at the interface between electrolyte and counter electrode, which remarkably improved the fill factor, short-circuit current density, and power conversion efficiency of the quantum-dot-sensitized solar cell. Under illumination of one sun (100 mW/cm²), the quantum-dot-sensitized solar cell based on Ti porous film-supported NiCo₂S₄ nanotubes counter electrode achieved a power conversion efficiency of 3.14%, which is superior to the cell based on FTO/Pt counter electrode (1.3%).
本文采用酸蚀和两步水热法制备了一种新型的钛多孔膜负载的NiCo₂S₄纳米管，并将其用作CdS/CdSe量子点敏化太阳能电池的对电极。对称电池的循环伏安法、塔菲尔极化曲线和电化学阻抗谱测量结果表明，与传统的FTO（氟掺杂氧化锡）/Pt对电极相比，钛多孔膜负载的NiCo₂S₄纳米管对电极对多硫化物电解质表现出更高的电催化活性，并且在电解质与对电极之间的界面处具有更低的电荷转移电阻，这显著提高了量子点敏化太阳能电池的填充因子、短路电流密度和功率转换效率。在一个太阳（100 mW/cm²）光照下，基于钛多孔膜负载的NiCo₂S₄纳米管对电极的量子点敏化太阳能电池实现了3.14%的功率转换效率，优于基于FTO/Pt对电极的电池（1.3%）。
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