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首页> 外文期刊>Advanced Functional Materials >Effective Ligand Engineering of the Cu2ZnSnS4 Nanocrystal Surface for Increasing Hole Transport Efficiency in Perovskite Solar Cells
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Effective Ligand Engineering of the Cu2ZnSnS4 Nanocrystal Surface for Increasing Hole Transport Efficiency in Perovskite Solar Cells

机译：Cu2ZnSnS4纳米晶体表面的有效配体工程，以提高钙钛矿太阳能电池的空穴传输效率。

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摘要

Effective engineering of surface ligands in semiconductor nanocrystals can facilitate the electronic interaction between the individual nanocrystals, making them promising for low-cost optoelectronic applications. Here, the use of high purity Cu2ZnSnS4 (CZTS) nanocrystals as the photoactive layer and hole-transporting material is reported in low-temperature solution-processed solar cells. The high purity CZTS nanocrystals are prepared by engineering the surface ligands of CZTS nanocrystals, capped originally with the long-chain organic ligand oleylamine. After ligand removal, CZTS nanocrystals show substantial improvement in photoconductivity and mobility, displaying also an appreciable photoresponse in a simple heterojunction solar cell architecture. More notably, CZTS nanocrystals exhibit excellent hole-transporting properties as interface layer in perovskite solar cells, yielding power conversion efficiency (PCE) of 15.4% with excellent fill factor (FF) of 81%. These findings underscore the importance of removing undesired surface ligands in nanocrystalline optoelectronic devices, and demonstrate the great potential of CZTS nanocrystals as both active and passive material for the realization of low-cost efficient solar cells.
机译：半导体纳米晶体中表面配体的有效工程化可以促进各个纳米晶体之间的电子相互作用，使其对于低成本光电应用很有希望。在此，据报道在低温溶液处理的太阳能电池中使用高纯度的Cu2ZnSnS4（CZTS）纳米晶体作为光敏层和空穴传输材料。高纯度CZTS纳米晶体是通过对CZTS纳米晶体的表面配体进行工程化制备的，该表面配体最初被长链有机配体油胺封端。去除配体后，CZTS纳米晶体显示出光电导率和迁移率的显着改善，在简单的异质结太阳能电池结构中也显示出可观的光响应。更值得注意的是，CZTS纳米晶体在钙钛矿型太阳能电池中表现出优异的空穴传输性能（作为界面层），功率转换效率（PCE）为15.4％，填充系数（FF）为81％。这些发现强调了去除纳米晶体光电器件中不希望的表面配体的重要性，并证明了CZTS纳米晶体作为实现低成本高效太阳能电池的主动和被动材料的巨大潜力。

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  • 来源
    《Advanced Functional Materials》 |2016年第45期|8300-8306|共7页
  • 作者

    Khanzada Laraib Sarfraz; Levchuk Ievgen; Hou Yi; Azimi Hamed; Osvet Andres; Ahmad Rameez; Brandl Marco; Herre Patrick; Distaso Monica; Hock Rainer; Peukert Wolfgang; Batentschuk Miroslaw; Brabec Christoph J.;

  • 作者单位

    Friedrich Alexander Univ Erlangen Nurnberg ( FAU), Dept Mat Sci & Engn, I MEET, Martensstr 7, D-91058 Erlangen, Germany|NED Univ Engn & Technol, Dept Met Engn, Univ Rd, Karachi 75270, Pakistan;

    Friedrich Alexander Univ Erlangen Nurnberg ( FAU), Dept Mat Sci & Engn, I MEET, Martensstr 7, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg ( FAU), Dept Mat Sci & Engn, I MEET, Martensstr 7, D-91058 Erlangen, Germany|Erlangen Grad Sch Adv Opt Technol SAOT, Paul Gordan Str 6, D-91052 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg ( FAU), Dept Mat Sci & Engn, I MEET, Martensstr 7, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg ( FAU), Dept Mat Sci & Engn, I MEET, Martensstr 7, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Particle Technol, Cauerstr 4, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Staudtstr 3, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Particle Technol, Cauerstr 4, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Particle Technol, Cauerstr 4, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Staudtstr 3, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Particle Technol, Cauerstr 4, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg ( FAU), Dept Mat Sci & Engn, I MEET, Martensstr 7, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg ( FAU), Dept Mat Sci & Engn, I MEET, Martensstr 7, D-91058 Erlangen, Germany|Bavarian Ctr Appl Energy Res ZAE Bayern, Weichselgarten 7, D-91058 Erlangen, Germany;

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