4.8 Article

Quantification of Nano- and Mesoscale Phase Separation and Relation to Donor and Acceptor Quantum Efficiency, JSC, and FF in Polymer:Fullerene Solar Cells

Journal

ADVANCED MATERIALS
Volume 26, Issue 25, Pages 4234-4241

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201400216

Keywords

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Funding

  1. U.S. Department of Energy, Office of Science, Basic Energy Science, Division of Materials Science and Engineering [DE-FG02-98ER45737]
  2. Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
  3. National High Technology Research and Development Program 863 [2011AA050523]
  4. Chinese Academy of Sciences
  5. Ministry of Science and Technology of China
  6. NSFC [S2012GR0224, 51173189]

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Two characteristic length scales are revealed and quantified in a complex hierarchical polymer-fullerene blend by combining different X-ray scattering techniques. Anti-correlated composition variations between meso- and nanoscale separation are observed and impacted by the solvent mixture. Due to competition between the impact of the two length scales, the relation to device performance is complex and an ideal morphology is yet to be delineated.

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