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Influence of surface states of CuInS2 quantum dots in quantum dots sensitized photo-electrodes

机译：量子点敏化光电电极中CuInS2量子点的表面状态的影响

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摘要

Surface states are significant factor for the enhancement of electrochemical performance in CuInS2 quantum dot sensitized photo-electrodes. DDT, OLA, MPA, and S2- ligand capped CuInS2 quantum dot sensitized photo-electrodes are prepared by thermolysis, solvethermal and ligand-exchange processes, respectively, and their optical properties and photoelectrochemical properties are investigated. The S2- ligand enhances the UV-vis absorption and electron-hole separation property as well as the excellent charge transfer performance of the photo-electrodes, which is attributed to the fact that the atomic S2- ligand for the interfacial region of quantum dots may improve the electron transfer rate. These S2--capped CuInS2 quantum dot sensitized photo-electrodes exhibit the excellent photoelectrochemical efficiency and IPCE peak value, which is higher than that of the samples with DDT, OLA and MPA ligands. (C) 2015 Elsevier B.V. All rights reserved.
机译：表面状态是增强CuInS2量子点敏化光电电极电化学性能的重要因素。通过热解，溶解热和配体交换工艺分别制备了DDT，OLA，MPA和S2-配体封端的CuInS2量子点敏化光电电极，并研究了它们的光学性质和光电化学性质。 S2-配体增强了光电极的紫外可见吸收和电子-空穴分离性能以及出色的电荷转移性能，这归因于这样的事实，即量子点界面区域的原子S2-配体可能提高电子传输速率。这些用S2封端的CuInS2量子点敏化的光电极表现出优异的光电化学效率和IPCE峰值，高于具有DDT，OLA和MPA配体的样品。 （C）2015 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2016年第ptaa期|437-443|共7页
  • 作者

    Peng Zhuoyin; Liu Yueli; Wu Lei; Zhao Yinghan; Chen Keqiang; Chen Wen;

  • 作者单位

    Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China;

    Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China;

    Wuhan Railway Vocat Coll Technol, Sch Elect & Elect, Wuhan 430205, Peoples R China;

    Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China;

    Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China;

    Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    CuInS2 quantum dot sensitized photo-electrodes; Surface states; Electrochemical performance enhancement;

    机译：CuInS2量子点敏化光电电极表面态电化学性能增强;

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