Aqueous nanoparticle polymer solar cells: effects of surfactant concentration and processing on device performance

F.J.M. Colberts, M.M. Wienk, R.A.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

27 Citations (Scopus)
101 Downloads (Pure)

Abstract

Polymer solar cells based on PDPP5T and PCBM as donor and acceptor materials, respectively, were processed from aqueous nanoparticle dispersions. Careful monitoring and optimization of the concentration of free and surface-bound surfactants in the dispersion, by measuring the conductivity and ζ-potential, is essential to avoid aggregation of nanoparticles at low concentration and dewetting of the film at high concentration. The surfactant concentration is crucial for creating reproducible processing conditions that aid in further developing aqueous nanoparticle processed solar cells. In addition, the effects of adding ethanol, of aging the dispersion, and of replacing [60]PCBM with [70]PCBM to enhance light absorption were studied. The highest power conversion efficiencies (PCEs) obtained are 2.0% for [60]PCBM and 2.4% for [70]PCBM-based devices. These PCEs are limited by bimolecular recombination of photogenerated charges. Cryo-TEM reveals that the two components phase separate in the nanoparticles, forming a PCBM-rich core and a PDPP5T-rich shell and causing a nonoptimal film morphology.

Original languageEnglish
Pages (from-to)13380-13389
Number of pages10
JournalACS Applied Materials & Interfaces
Volume9
Issue number15
DOIs
Publication statusPublished - 19 Apr 2017

Keywords

  • conductivity
  • fullerene
  • miniemulsion
  • nanoparticle dispersion
  • organic photovoltaics
  • semiconducting polymer
  • surfactant
  • ζ-potential

Fingerprint Dive into the research topics of 'Aqueous nanoparticle polymer solar cells: effects of surfactant concentration and processing on device performance'. Together they form a unique fingerprint.

  • Cite this