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Mechanical and Electrical Behavior of Organic Solar Cells Probed Through Detailed Morphological Control.

机译:通过详细的形态控制探测有机太阳能电池的机械和电气行为。

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摘要

One of the main advantages of organic solar cells is their potential to be used in flexible or even stretchable applications. Most research in the field of organic solar cells is focused on materials synthesis, device physics, and the relationship between morphology and the optoelectronic performance. In order for this technology to be commercially competitive, especially for flexible applications, a more complete picture that explores the mechanical properties of organic materials and how they relate to their optoelectronic properties is necessary. This thesis consists of two main research tracks: The first track focuses mainly on the effect of morphology on the mechanical, electrical and optical performance of organic solar cells controlled through varying processing conditions. Two mechanical properties are investigated including the elastic modulus and crack onset strain of P3HT, PCBM and blend (BHJ) films. The second track utilizes the high achievable ductility of organic semiconducting films that is investigated in the first track of the thesis, to create novel solar cell device architectures and to gain insight into the performance and recombination losses of organic solar cells. Processing ductile BHJ films is used to create organic solar cells with controlled level of polarization with both opaque and semi-transparent architectures. Moreover, using the strain-alignment method the efficiency of low and high order P3HT aggregates is probed within the same film to show similar internal quantum efficiency for the two different morphological P3HT domains. This selective probing technique provides significant insight into performance loss mechanisms in organic solar cells.
机译:有机太阳能电池的主要优点之一是其在柔性甚至可拉伸应用中使用的潜力。有机太阳能电池领域中的大多数研究都集中在材料合成,器件物理以及形态与光电性能之间的关系上。为了使这项技术在商业上具有竞争优势,尤其是在灵活应用方面,必须有一张更完整的图来探索有机材料的机械性能以及它们与光电子性能的关系。本论文包括两个主要的研究方向:第一个方向主要关注形态对通过变化加工条件控制的有机太阳能电池的机械,电和光学性能的影响。研究了两种机械性能,包括P3HT,PCBM和共混(BHJ)膜的弹性模量和裂纹萌生应变。第二篇文章利用了在本文第一篇文章中研究的有机半导体薄膜的高可延展性,以创建新颖的太阳能电池器件架构,并深入了解有机太阳能电池的性能和复合损失。加工可延展的BHJ膜可用于制造具有不透明和半透明结构的极化程度可控的有机太阳能电池。此外,使用应变对准方法,可在同一膜内探测低阶和高阶P3HT聚集体的效率,以显示两个不同形态P3HT域的相似内部量子效率。这种选择性探测技术为有机太阳能电池的性能损失机理提供了重要的见识。

著录项

  • 作者

    Awartani, Omar Marwan.;

  • 作者单位

    North Carolina State University.;

  • 授予单位 North Carolina State University.;
  • 学科 Mechanical engineering.;Materials science.;Electrical engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 186 p.
  • 总页数 186
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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