4.8 Article

Highly Crystalline Films of PCPDTBT with Branched Side Chains by Solvent Vapor Crystallization: Influence on Opto-Electronic Properties

Journal

ADVANCED MATERIALS
Volume 27, Issue 7, Pages 1223-1228

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201403475

Keywords

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Funding

  1. DFG [SPP-1355]
  2. Emmy Noether Program
  3. EU
  4. BMBF [FKZ 03IS2151D]
  5. European Community [C25 Rhin-Solar]
  6. U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
  7. U.S. Department of Energy, Division of Basic Energy Sciences [DE-FG02-10ER4779]

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PCPDTBT, a marginally crystallizable polymer, is crystallized into a new crystal structure using solvent-vapor annealing. Highly ordered areas with three different polymer-chain orientations are identified using TEM/ED, GIWAXS, and polarized Raman spectroscopy. The optical and structural properties differ significantly from films prepared by standard device preparation protocols. Bilayer solar cells, however, show similar performance.

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