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 Daniel Gomez, Cherno Jaye, Jeffrey Schwartz, Daniel A. Fischer, Yueh Lin Loo

Research output: Contribution to journalArticle

7 Citations (Scopus)

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 - Jan 1 2014

Fingerprint

Phosphorous Acids
Self assembled monolayers
Molecular orbitals
Discrete Fourier transforms
Carrier concentration
Heterojunctions
Anodes
anodes
solar cells
chemistry
Acids
polymers
heterojunctions
molecular orbitals
acids
decay
Polymer solar cells

All Science Journal Classification (ASJC) codes

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

Cite this

Wang, He ; Mativetsky, Jeffrey M. ; Ren, Yi ; Gomez, Enrique Daniel ; Jaye, Cherno ; Schwartz, Jeffrey ; Fischer, Daniel A. ; Loo, Yueh Lin. / Fluorinated and hydrogenated self-assembled monolayers (SAMs) on anodes : Effects of SAM chemistry on device characteristics of polymer solar cells. In: Organic Electronics. 2014 ; Vol. 15, No. 11. pp. 3333-3340.
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Fluorinated and hydrogenated self-assembled monolayers (SAMs) on anodes : Effects of SAM chemistry on device characteristics of polymer solar cells. / Wang, He; Mativetsky, Jeffrey M.; Ren, Yi; Gomez, Enrique Daniel; Jaye, Cherno; Schwartz, Jeffrey; Fischer, Daniel A.; Loo, Yueh Lin.

In: Organic Electronics, Vol. 15, No. 11, 01.01.2014, p. 3333-3340.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fluorinated and hydrogenated self-assembled monolayers (SAMs) on anodes

T2 - Effects of SAM chemistry on device characteristics of polymer solar cells

AU - Wang, He

AU - Mativetsky, Jeffrey M.

AU - Ren, Yi

AU - Gomez, Enrique Daniel

AU - Jaye, Cherno

AU - Schwartz, Jeffrey

AU - Fischer, Daniel A.

AU - Loo, Yueh Lin

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AB - 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.

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