4.8 Article

The Effect of Processing Additives on Energetic Disorder in Highly Efficient Organic Photovoltaics: A Case Study on PBDTTT-C-T:PC71BM

Journal

ADVANCED MATERIALS
Volume 27, Issue 26, Pages 3868-+

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201405913

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Funding

  1. Swedish Research Council (VR)
  2. European Commission Marie Sklodowska-Curie actions
  3. Swedish Energy Agency
  4. Knut and Alice Wallenberg foundation (KAW)

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Energetic disorder, an important parameter affecting the performance of organic photovoltaics, is significantly decreased upon the addition of processing additives in a highly efficient benzodithiophene-based copolymer blend (PBDTTT-C-T:PC71BM). Wide-angle and small-angle X-ray scattering measurements suggest that the origin of this reduced energetic disorder is due to increased aggregation and a larger average fullerene domain size together with purer phases.

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