Controlled dispersion of polystyrene-capped Au nanoparticles in P3HT: PC61BM and consequences upon active layer nanostructure

Dennis P. Butcher, Robert C. Wadams, Lawrence Drummy, Hilmar Koerner, Chris Bailey, Frank Scheltens, David McComb, Laura Fabris, Michael F. Durstock, Christopher Tabor

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Numerous recent publications detail higher absorption and photovoltaic performance within organic photovoltaic (OPV) devices which are loaded with Au or Ag nanoparticles to leverage the light management properties of the localized surface plasmon resonance (LSPR). This report details the impact upon film morphology and polymer/nanoparticle interactions caused by incorporation of polystyrene-coated Au nanoparticles (Au/PS) into the P3HT:PC61BM bulk heterojunction film. Nanostructural analysis by transmission electron microscopy and X-ray scattering reveals tunable Au/PS particle assembly that depends upon the choice of casting solvent, polymer chain length, film drying time, and Au/PS particle loading density. This Au/PS particle assembly has implications on the spectral position of the Au nanoparticle LSPR, which shifts from 535 nm for individually dispersed particles in toluene to 650 nm for particles arranged in large clusters within the P3HT:PC61BM matrix. These results suggest a critical impact from PS/P3HT phase separation, which causes controlled assembly of a separate Au/PS phase in the nanoparticle/OPV composite; controlled Au/PS phase formation provides a blueprint for designing AuNP/OPV hybrid films that impart tunable optical behavior and potentially improve photovoltaic performance.

Original languageEnglish
Pages (from-to)709-720
Number of pages12
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume54
Issue number7
DOIs
Publication statusPublished - Apr 1 2016

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Keywords

  • bulk heterojunction
  • composite
  • localized surface plasmon resonance
  • nanoparticles
  • nanostructure
  • organic photovoltaic
  • plasmonic enhancement
  • self-assembly

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Butcher, D. P., Wadams, R. C., Drummy, L., Koerner, H., Bailey, C., Scheltens, F., McComb, D., Fabris, L., Durstock, M. F., & Tabor, C. (2016). Controlled dispersion of polystyrene-capped Au nanoparticles in P3HT: PC61BM and consequences upon active layer nanostructure. Journal of Polymer Science, Part B: Polymer Physics, 54(7), 709-720. https://doi.org/10.1002/polb.23962