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首页> 外文期刊>Advanced energy materials >Relation of Nanostructure and Recombination Dynamics in a Low-Temperature Solution-Processed CuInS_2 Nanocrystalline Solar Cell
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Relation of Nanostructure and Recombination Dynamics in a Low-Temperature Solution-Processed CuInS_2 Nanocrystalline Solar Cell

机译：低温固溶处理的CuInS_2纳米晶太阳能电池的纳米结构与复合动力学关系

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摘要

The understanding and control of nanostructures with regard to transport and recombination mechanisms is of key importance in the optimization of the power conversion efficiency (PCE) of solar cells based on inorganic nanocrystals. Here, the transport properties of solution-processed solar cells are investigated using photo-CELIV (photogenerated charge carrier extraction by linearly increasing voltage) and transient photovoltage techniques; the solar cells are prepared by an in-situ formation of CuInS_2 nanocrystals (CIS NCs) at the low temperature of 270℃. Structural and morphological analyses reveal the presence of a metastable CuIn_5S_8 phase and a disordered morphology in the CuInS_2 nanocrytalline films consisting of polycrystalline grains at the nanoscale range. Consistent with the disordered morphology of the CIS NC thin films, the CIS NC devices are characterized by a low carrier mobility. The carrier density dynamic indicates that the recombination kinetics in these devices follows the dispersive bimolecular recombination model and does not fully behave in a diffusion-controlled manner, as expected by Langevin-type recombination. The mobility-lifetime product of the charge carriers properly explains the performance of the thin (200 nm) CIS NC solar cell with a high fill-factor of 64% and a PCE of over 3.5%.
机译：在传输和复合机理方面，了解和控制纳米结构对于优化基于无机纳米晶体的太阳能电池的功率转换效率（PCE）至关重要。在这里，使用photo-CELIV（通过线性增加电压来提取光生电荷载流子）和瞬态光电压技术来研究固溶处理的太阳能电池的传输特性。通过在270℃的低温下原位形成CuInS_2纳米晶体（CIS NCs）制备太阳能电池。结构和形态分析表明，在由纳米级多晶组成的CuInS_2纳米晶薄膜中，存在亚稳态CuIn_5S_8相和无序形态。与CIS NC薄膜的无序形态一致，CIS NC器件的特点是载流子迁移率低。载流子密度动态表明，这些装置中的重组动力学遵循分散的双分子重组模型，并且不像Langevin型重组所预期的那样以扩散控制的方式完全发挥作用。电荷载流子的迁移寿命终产物可以正确解释薄（200 nm）CIS NC太阳能电池的性能，其高填充因子为64％，PCE超过3.5％。

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  • 来源
    《Advanced energy materials》 |2013年第12期|1589-1596|共8页
  • 作者

    Hamed Azimi; Thomas Heumueller; Andreas Gerl; Gebhard Matt; Peter Kubis; Monica Distaso; Rameez Ahmad; Tugce Akdas; Moses Richter; Wolfgang Peukert; Christoph J. Brabec;

  • 作者单位

    Institute of Materials for Electronics and Energy Technology (I-MEET) Department of Materials Science and Engineering Friedrich-Alexander University Erlangen-Nuremberg Martensstrasse 7, 91058, Erlangen, Germany;

    Institute of Materials for Electronics and Energy Technology (I-MEET) Department of Materials Science and Engineering Friedrich-Alexander University Erlangen-Nuremberg Martensstrasse 7, 91058, Erlangen, Germany;

    Institute of Materials for Electronics and Energy Technology (I-MEET) Department of Materials Science and Engineering Friedrich-Alexander University Erlangen-Nuremberg Martensstrasse 7, 91058, Erlangen, Germany;

    Institute of Materials for Electronics and Energy Technology (I-MEET) Department of Materials Science and Engineering Friedrich-Alexander University Erlangen-Nuremberg Martensstrasse 7, 91058, Erlangen, Germany;

    Institute of Materials for Electronics and Energy Technology (I-MEET) Department of Materials Science and Engineering Friedrich-Alexander University Erlangen-Nuremberg Martensstrasse 7, 91058, Erlangen, Germany;

    Institute of Particle Technology F. A. U. Erlangen-Nuremberg Cauerstrasse 4, 91058, Erlangen, Germany;

    Institute of Particle Technology F. A. U. Erlangen-Nuremberg Cauerstrasse 4, 91058, Erlangen, Germany;

    Institute of Particle Technology F. A. U. Erlangen-Nuremberg Cauerstrasse 4, 91058, Erlangen, Germany;

    Institute of Materials for Electronics and Energy Technology (I-MEET) Department of Materials Science and Engineering Friedrich-Alexander University Erlangen-Nuremberg Martensstrasse 7, 91058, Erlangen, Germany;

    Institute of Particle Technology F. A. U. Erlangen-Nuremberg Cauerstrasse 4, 91058, Erlangen, Germany;

    Institute of Materials for Electronics and Energy Technology (I-MEET) Department of Materials Science and Engineering Friedrich-Alexander University Erlangen-Nuremberg Martensstrasse 7, 91058, Erlangen, Germany,Bavarian Center for Applied Energy Research (ZAE Bayern) Am Weichselgarten 7, 91058, Erlangen, Germany;

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