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Improved performance of quantum dot-sensitized solar cells adopting a highly efficient cobalt sulfideickel sulfide composite thin film counter electrode

机译:采用高效硫化钴/硫化镍复合薄膜对电极的量子点敏化太阳能电池的性能改善

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摘要

Cobalt sulfide (CoS), nickel sulfide (NiS), and cobalt sulfideickel sulfide (CoS/NiS) were deposited onto fluorine-doped tin oxide (FTO) substrate using a facile chemical bath deposition method and utilized as counter electrodes (CEs) for polysulfide redox reactions in CdS/CdSe quantum dot-sensitized solar cells (QDSSCs). The thickness of 750 nm and 695 nm are optimized for NiS and CoS electrodes to prepare the CoS/NiS CE. Compared to a platinum (Pt) electrode, the CoS, NiS, and composite CoS/NiS electrodes provide higher electrocatalytic activity and lower charge-transfer resistance. The combination of a QDSSC with composite CoS/NiS CE shows an improved power conversion efficiency of 3.40% under the illumination of one sun (100 mW cm~(-2)), which is higher than the CoS (2.53%), NiS (2.61%), and Pt (1.47%) CEs. This enhancement is mainly attributed to the NiS nanoparticles deposited on CoS film, due to which the composite structure exhibits a lower charge transfer resistance (7.61 Ω) at the interface of the CE and the electrolyte, along with superior electrochemical catalytic ability. This is well supported by the cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization measurements.
机译:使用简便的化学浴沉积方法将硫化钴(CoS),硫化镍(NiS)和硫化钴/硫化镍(CoS / NiS)沉积在掺氟氧化锡(FTO)基板上,并用作对电极(CEs)用于CdS / CdSe量子点敏化太阳能电池(QDSSC)中的多硫化物氧化还原反应。针对NiS和CoS电极优化了750 nm和695 nm的厚度,以制备CoS / NiS CE。与铂(Pt)电极相比,CoS,NiS和CoS / NiS复合电极提供更高的电催化活性和更低的电荷转移电阻。 QDSSC与复合CoS / NiS CE的组合在1个太阳(100 mW cm〜(-2))的光照下显示出3.40%的改善的功率转换效率,高于CoS(2.53%),NiS( CE(2.61%)和Pt(1.47%)CE。这种增强主要归因于沉积在CoS膜上的NiS纳米颗粒,由于该复合结构在CE和电解质的界面处表现出较低的电荷转移电阻(7.61Ω),同时具有优异的电化学催化能力。循环伏安法,电化学阻抗谱和Tafel极化测量法对此提供了很好的支持。

著录项

  • 来源
    《Journal of power sources》 |2014年第5期|163-170|共8页
  • 作者单位

    School of Electrical Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 609-735, South Korea;

    School of Electrical Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 609-735, South Korea;

    School of Electrical Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 609-735, South Korea;

    School of Electrical Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 609-735, South Korea;

    School of Electrical Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 609-735, South Korea;

    School of Electrical Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 609-735, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Counter electrode; Cobalt sulfide; Nickel sulfide; Cobalt sulfideickel sulfide; Quantum dot solar cell; Electrocatalytic activity;

    机译:对电极;硫化钴硫化镍硫化钴/硫化镍;量子点太阳能电池;电催化活性;
  • 入库时间 2022-08-18 00:23:07

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