Layer-by-layer assembly of thin film zener diodes from conducting polymers and CdSe nanoparticles

Thierry Cassagneau, Thomas E. Mallouk, Janos H. Fendler

Research output: Contribution to journalArticle

280 Citations (Scopus)

Abstract

Ultrathin films have been prepared by self-assembling trioctylphosphine oxide, TOPO, capped n-type 20-40 Å diameter CdSe nanoparticles and 1,6- hexadecanethiol, HDT, onto p-doped semiconducting polymers, chemically deposited poly(3-methylthiophene), PMeT (for Device A), and electrochemically deposited poly(pyrrole), Ppy (for Device B). The semiconducting polymers have, in turn, been electrochemically layered (for Device A) or layer-by- layer chemically assembled (for Device B) onto derivatized conducting substrates. The ultrathin films have been characterized by absorption and emission spectroscopy, transmission electron microscopy, scanning force microscopy, X-ray photoelectron spectroscopy, and by electrochemical measurements. By controlling the level of doping into the p-type junction, it was possible to prepare dissymmetrical junctions and observe a rectifying behavior in the forward direction and a Zener breakdown in the reverse direction for Au/PMeT/(HDT/CdSe)3, Device A, and for Au/MEA/Ppy/(HDT/CdSe)3, Device B. Additionally, Au/MeA/PAH/CdSe (PAH = poly(allylamine hydrochloride)), Au/MEA/Ppy/PSS/CdSe (PSS = polystyrene sulfonate), and Au/MEA/Ppy/α-ZrP/CdSe (α-ZrP = α zirconium phosphate) films have been prepared and characterized.

Original languageEnglish (US)
Pages (from-to)7848-7859
Number of pages12
JournalJournal of the American Chemical Society
Volume120
Issue number31
DOIs
StatePublished - Aug 12 1998

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Zener diodes
Semiconducting polymers
Ultrathin films
Conducting polymers
Polycyclic aromatic hydrocarbons
Nanoparticles
Zener effect
Polymers
Thin films
Equipment and Supplies
Pyrroles
Emission spectroscopy
Absorption spectroscopy
Zirconium
Atomic force microscopy
Polystyrenes
Phosphates
X ray photoelectron spectroscopy
Doping (additives)
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Cassagneau, Thierry ; Mallouk, Thomas E. ; Fendler, Janos H. / Layer-by-layer assembly of thin film zener diodes from conducting polymers and CdSe nanoparticles. In: Journal of the American Chemical Society. 1998 ; Vol. 120, No. 31. pp. 7848-7859.
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Layer-by-layer assembly of thin film zener diodes from conducting polymers and CdSe nanoparticles. / Cassagneau, Thierry; Mallouk, Thomas E.; Fendler, Janos H.

In: Journal of the American Chemical Society, Vol. 120, No. 31, 12.08.1998, p. 7848-7859.

Research output: Contribution to journalArticle

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