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Fluorinated Polymer Yields High Organic Solar Cell Performance for a Wide Range of Morphologies

机译：氟化聚合物可在各种形态下实现高有机太阳能电池性能

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摘要

Device performance is recognized to be generally sensitive to morphology in bulk heterojunction solar cells. Through the use of quantitative morphological measurements, it is demonstrated that devices based on benzodithiophene and fluorinated benzotriazole moieties constitute an exception to this design rule and exhibit a range of morphologies that yield similar high performance. In particular, the fill factor (FF) remains above 65% even with factor of two changes in domain size and factor of two changes in relative domain purity. Devices with active layer thicknesses of 250 nm are employed, which are capable of increasing optical absorption to produce high photocurrent. The general insensitivity to both morphology and thickness is likely related to the measured low equilibrium miscibility of fullerene in the polymer of 3-4%. The materials and processes investigated therefore provide insights into functional material design that yield increased processing latitude and may be more amenable to roll-to-roll processing.
机译：一般认为，器件性能对整体异质结太阳能电池的形态敏感。通过使用定量形态学测量，证明基于苯并二噻吩和氟化苯并三唑部分的器件构成了该设计规则的例外，并展现出可产生相似高性能的一系列形态。尤其是，即使域大小有两个变化的因子和相对域纯度有两个变化的因子，填充因子（FF）仍保持在65％以上。使用具有250nm有源层厚度的器件，该器件能够增加光吸收以产生高光电流。对形态和厚度的总体不敏感性可能与所测得的聚合物中富勒烯的低平衡混溶性（3-4％）有关。因此，所研究的材料和工艺为功能材料设计提供了见识，从而提高了加工范围，并且可能更适合卷对卷加工。

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  • 来源
    《Advanced Functional Materials》 |2013年第27期|3463-3470|共8页
  • 作者

    John R. Tumbleston; Andrew C. Stuart; Eliot Cann; Wei You; Harald Ade;

  • 作者单位

    Department of Physics North Carolina State University Raleigh, NC, 27695, USA;

    Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill, NC, 27599, USA;

    Department of Physics North Carolina State University Raleigh, NC, 27695, USA;

    Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill, NC, 27599, USA;

    Department of Physics North Carolina State University Raleigh, NC, 27695, USA;

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