4.8 Article

Improved Film Morphology Reduces Charge Carrier Recombination into the Triplet Excited State in a Small Bandgap Polymer-Fullerene Photovoltaic Cell

Journal

ADVANCED MATERIALS
Volume 22, Issue 38, Pages 4321-+

Publisher

WILEY-BLACKWELL
DOI: 10.1002/adma.201001452

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Funding

  1. Dutch Polymer Institute (DPI) [631, 524, 660]
  2. European Commission through Marie-Curie Research Training Network NANOMATCH [MRTN-CT-2006-035884]

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The use of diiodooctane as processing additive for construction of PCPDTBT: PCBM solar cells results in a profound change in photophysical behavior of this blend. In the improved morphology obtained with the additive, recombination of charge carriers to the lowest triplet excited state is suppressed. This contributes to the boost in solar power conversion efficiency induced by the use of the processing agent.

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