4.7 Article

Simultaneous cross-linking and p-doping of a polymeric semiconductor film by immersion into a phosphomolybdic acid solution for use in organic solar cells

Journal

CHEMICAL COMMUNICATIONS
Volume 52, Issue 19, Pages 3825-3827

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cc01022a

Keywords

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Funding

  1. Department of the Navy, Office of Naval Research Award through the MURI Center CAOP, Office of Naval Research Award [N00014-14-1-0580, N00014-04-1-0313]
  2. Department of Energy through the Bay Area Photovoltaic Consortium [DE-EE0004946]
  3. Japan Society for the Promotion of Science (JSPS) KAKENHI [13J10532, 15H06470]
  4. Foundation for the Promotion of Ion Engineering

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Poly[N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT) is shown to be simultaneously cross-linked and p-doped when immersed into a phosphomolybdic acid solution, yielding conductive films with low solubility that can withstand the solution processing of subsequent photoactive layers. Such a modified PCDTBT film serves to improve hole collection and limit carrier recombination in organic solar cells.

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