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首页> 外文期刊>Advanced Functional Materials >Uncovering Buried Structure and Interfaces in Molecular Photovoltaics
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Uncovering Buried Structure and Interfaces in Molecular Photovoltaics

机译：在分子光伏中发现埋藏的结构和界面

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摘要

The processes that generate current in organic photovoltaics are highly dependent on the micro- and nano-structure in the semiconductor layers, especially at the donor-acceptor interface. Elucidating film properties throughout the thickness of the devices is therefore key to their further development. Here, a methodology is developed to gain unprecedented insights into the structure and composition of the molecular layers within the depth of device structure using high resolution transmission electron microscopy (HRTEM). The technique was applied to three archetypical solar cell configurations consisting of copper phthalocyanine (CuPc) and C_(60), which have been cross-sectioned using a focused ion beam method optimized to minimize sample damage. The HRTEM images exhibit lattice fringes in both CuPc and C_(60), confirming the crystallinity and texture of both materials, and offering novel insight into the growth of C_(60) onto molecular materials. The donor-acceptor interface morphology is further studied using scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray (EDX) spectroscopy, extending the scope of our methodology to amorphous heterostructures.
机译：在有机光伏中产生电流的过程高度依赖于半导体层中的微结构和纳米结构，特别是在施主-受主界面处。因此，阐明整个器件厚度的薄膜特性是其进一步发展的关键。在这里，开发了一种方法，以利用高分辨率透射电子显微镜（HRTEM）对器件结构深度内的分子层的结构和组成获得前所未有的见识。该技术已应用于由铜酞菁（CuPc）和C_（60）组成的三种原型太阳能电池配置，已使用聚焦离子束方法对横截面进行了优化，以最大程度地减少样品损坏。 HRTEM图像在CuPc和C_（60）中均显示出晶格条纹，确认了两种材料的结晶度和织构，并为C_（60）在分子材料上的生长提供了新颖的见解。使用扫描透射电子显微镜（STEM）结合能量色散X射线（EDX）光谱对供体-受体界面形态进行了进一步研究，将我们的方法学范围扩展到了非晶异质结构。

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  • 来源
    《Advanced Functional Materials》 |2014年第41期|6473-6483|共11页
  • 作者

    James B. Gilchrist; Toby. H. Basey-Fisher; Sharon CE. Chang; Frank Scheltens; David W. McComb; Sandrine Heutz;

  • 作者单位

    Department of Materials Imperial College London SW7 2AZ, UK;

    Department of Materials Imperial College London SW7 2AZ, UK;

    Department of Physics and Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore and Department of Materials Imperial College London SW7 2AZ, UK;

    Department of Material Science and Engineering The Ohio State University Columbus, Ohio 43212, USA;

    Department of Material Science and Engineering The Ohio State University Columbus, Ohio 43212, USA;

    Department of Materials Imperial College London SW7 2AZ, UK;

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