Influences of the surrounding materials on CdTe nanoparticles within self-assembled thin films

H. C. Gardner, C. Bertoni, D. E. Gallardo, S. Dunn, M. G. Cain

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We report the effects of temperature, radiation and inter-particle distance on thin films of CdTe nanoparticles. Temperature cycling thin films between 293K and 358K resulted in a shift of 10nm in photoluminescence wavelength and a loss in emission intensity. Thermally activated trap states cause the nanoparticles to emit at different wavelengths at different temperatures. Small amounts (1 hour) of UV irradiation enhance emission from the thin films leading to higher energy wavelengths and increased intensity. Longer (4 hour) exposure to UV radiation reverses these effects and causes deterioration of the luminescence. Increasing the number of layers in a thin film results in a red-shift in the photoluminescence spectra. The inter-particle distance is decreased increasing the opportunity for inter-particle energy transfer.

Original languageEnglish
Title of host publication2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings
Pages395-398
Number of pages4
Publication statusPublished - 24 May 2007
Externally publishedYes
Event2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007 - Santa Clara, CA, United States
Duration: 20 May 200724 May 2007

Publication series

Name2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings
Volume1

Conference

Conference2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007
Country/TerritoryUnited States
CitySanta Clara, CA
Period20/05/0724/05/07

Keywords

  • CdTe
  • Light-emitting
  • Nanoparticle
  • Photoluminescence
  • Temperature

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