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Related Experiment Videos

Evaporated nanostructured Y2O3:Eu thin films.

P C P Hrudey1, M Taschuk, Y Y Tsui

  • 1Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada T6G 2V4.

Journal of Nanoscience and Nanotechnology
|April 28, 2005
PubMed
Summary

Europium-doped yttrium oxide thin films were created using glancing angle deposition. Annealing and optimizing doping levels enhanced photoluminescence, demonstrating control over nanostructure and optical properties.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Europium-doped yttrium oxide (Y2O3:Eu) is a key luminescent material.
  • Research has focused on thin-film forms, but nanostructure control is underexplored.

Purpose of the Study:

  • To investigate the impact of nanostructure modification on Y2O3:Eu thin films.
  • To optimize photoluminescence properties through controlled deposition and annealing.

Main Methods:

  • Utilized glancing angle deposition (GAD) to create slanted-post nanostructures.
  • Annealed films in air at 850°C for 10 hours.
  • Characterized nanostructure via scanning electron microscopy (SEM) and photoluminescence (PL) via UV laser excitation.

Main Results:

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  • Annealing increased photoluminescence intensity without altering the porous nanoscale geometry.
  • Higher europium doping levels in the source material led to enhanced PL responses.
  • Optimal oxygen partial pressure for electron-beam evaporation was found to be < 1.0 x 10⁻⁴ torr.

Conclusions:

  • GAD enables precise control over Y2O3:Eu thin-film nanostructures.
  • Post-deposition annealing and controlled doping/oxygen partial pressure are effective strategies for enhancing Y2O3:Eu photoluminescence.