Characterization of energy transfer processes occurring between pi-conjugated polymers and surface oxidized silicon nanoparticles

R. K. Ligman, L. Mangolini, U. R. Kortshagen, S. A. Campbell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electroluminescence (EL) from crystalline surface oxidized silicon nanoparticles (Si/SiO2 nps) randomly dispersed within Poly(9-Vinyl Carbazole) (PVK) was obtained. The energy transfer processes between the PVK polymer host and Si/SiO2 nps were investigated using intrinsic Poly(Fluorene)s (PFE). The PFE side chain lengths were selected to inhibit efficient energy transfer through direct carrier injection and Dexter processes by imposing a spatial separation between the polymer pi-conjugation and Si/SiO2 nps. Scalar EL emission, with no contribution from the Si/SiO2 nps, was observed from the three hybrid PFE(Si/SiO 2) devices implying no direct carrier injection, Förster or Dexter energy transfer processes occur in the PFE hybrid devices. The Si/SiO2 np loads used were well below the percolation threshold, verifying the observed bulk dominated JV characteristics, which strongly suggest the observed Si/SiO2 np emission from the hybrid PVK device was produced by direct carrier injection.

Original languageEnglish (US)
Title of host publication2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings
Pages522-525
Number of pages4
StatePublished - Aug 23 2007
Event2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007 - Santa Clara, CA, United States
Duration: May 20 2007May 24 2007

Publication series

Name2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings
Volume4

Other

Other2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007
CountryUnited States
CitySanta Clara, CA
Period5/20/075/24/07

Keywords

  • Electroluminescence
  • Hybrid device
  • Silicon nanoparticle

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