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首页> 外文期刊>Advanced Functional Materials >Formation of Bulk Heterojunctions by Alternative Thermal Deposition and Its Structure Analysis for High Efficiency Small Molecular Organic Photovoltaics
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Formation of Bulk Heterojunctions by Alternative Thermal Deposition and Its Structure Analysis for High Efficiency Small Molecular Organic Photovoltaics

机译：高效小分子有机光伏交替热沉积形成大体积异质结的结构分析

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摘要

We propose a new method to form small-molecule based bulk heterojunctions (SM-BH)s) through alternative thermal deposition (ATD), which is a simple modification of conventional thermal evaporation. By ATD, the thicknesses of alternative donor and acceptor layers are precisely controlled down to 0.1 nm, which is critical to form BHjs. The formation of a BHJ in copper(ll) phthalocyanine (CuPc) and fullerene (C_60) systems is confirmed by atomic force microscopy (AFM), grazing incidence X-ray small angle scattering (CISAXS), and absorption measurements. From analysis of the data, we find that the CuPc|C_60 films fabricated by ATD are composed of nanometer sized disk-shaped CuPc nano grains and aggregated C_60, which explains the phase separation of CuPc and C_60. On the other hand, the co-deposited CuPc:C_60 films do not show the existence of separated CuPc nano grains in the CuPc:C_60 matrix. The OPV cells fabricated using the ATD method show significantly enhanced power conversion efficiency compared to the co-deposited OPV cells with the same composition.
机译：我们提出了一种通过替代性热沉积（ATD）形成基于小分子的本体异质结（SM-BH）的新方法，该方法是对常规热蒸发的简单修改。通过ATD，可将供体和受体交替层的厚度精确控制到0.1 nm，这对于形成BHjs至关重要。原子力显微镜（AFM），掠入射X射线小角散射（CISAXS）和吸收测量证实了铜（II）酞菁（CuPc）和富勒烯（C_60）体系中BHJ的形成。通过数据分析，我们发现由ATD制备的CuPc | C_60膜由纳米尺寸的盘状CuPc纳米颗粒和聚集的C_60组成，这说明了CuPc和C_60的相分离。另一方面，共沉积的CuPc：C_60膜未显示在CuPc：C_60基质中存在分离的CuPc纳米晶粒。与具有相同组成的共沉积的OPV电池相比，使用ATD方法制造的OPV电池显示出显着增强的功率转换效率。

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  • 来源
    《Advanced Functional Materials》 |2011年第11期|p.2067-2071|共5页
  • 作者

    Ji Whan Kim; Hyojung Kim; Hyun Hwi Lee; Taemin Kim; jang-joo Kim;

  • 作者单位

    Department of Materials Science and Engineering, and OLED Center Seoul National University Seoul 151-744, Korea;

    Department of Materials Science and Engineering, and OLED Center Seoul National University Seoul 151-744, Korea;

    Pohang Accelerator Laboratory Kyungbuk, Pohang, 790-784, Korea;

    Department of Materials Science and Engineering, and OLED Center Seoul National University Seoul 151-744, Korea;

    Department of Materials Science and Engineering, and OLED Center Seoul National University Seoul 151-744, Korea;

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