Fluorinated and hydrogenated self-assembled monolayers (SAMs) on anodes: Effects of SAM chemistry on device characteristics of polymer solar cells

He Wang, Jeffrey M. Mativetsky, Yi Ren, Enrique D. Gomez, Cherno Jaye, Jeffrey Schwartz, Daniel A. Fischer, Yueh Lin Loo

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We adsorbed fluorinated-alkyl (FmSAM) and hydrogenated-alkyl (HmSAM) phosphonic acids with different molecular lengths on anodes of bulk-heterojunction polymer solar cells. We found the fill factors and series resistances of devices having FmSAMs to more steeply depend on molecular length than those having HmSAMs. We attribute this phenomenon to the smaller tunneling decay factor of HmSAM compared to FmSAM, which is consistent with DFT calculations that reveal differences in the extents of electron density localization of the highest occupied molecular orbitals of these species.

Original languageEnglish (US)
Pages (from-to)3333-3340
Number of pages8
JournalOrganic Electronics
Volume15
Issue number11
DOIs
StatePublished - Nov 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Keywords

  • Device characteristics
  • Fluorinated
  • Hydrogenated
  • Polymer solar cells
  • Self-assembled monolayer
  • Tunneling decay factor

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