Luminescent and crystalline properties of blue-white-emitting nanocrystalline Sr2CeO4 thin films produced by laser ablation

Néstor Perea, G. A. Hirata

Research output: Contribution to journalConference articlepeer-review

14 Scopus citations

Abstract

Blue-white luminescent Sr2CeO4 thin films were deposited by using pulsed laser ablation (λ = 248 nm wavelength) on 500 °C silicon (1 1 1) substrates under an oxygen pressure of 55 mTorr. High-resolution electron transmission microscopy and X-ray diffraction analysis revealed that the films were composed of nanocrystalline Sr2CeO 4 grains of the order of 20-30 nm with a preferential orientation in the (1 3 0) crystallographic direction. The excitation and photoluminescence spectra measured on the films maintained the characteristic emission of Sr 2CeO4 however, the emission peak appeared narrower and blue-shifted as compared to the luminescence spectrum of the target. This blue-shift of about 10 nm may be related to the nanocrystalline nature of the grains and the preferential crystallographic orientation during the growth formation of the film.

Original languageEnglish (US)
Pages (from-to)1212-1216
Number of pages5
JournalOptical Materials
Volume27
Issue number7
DOIs
StatePublished - Apr 2005
EventProceedings of the First Topical Meeting on Nanostructured Materials and Nanotechnology CIO 2004 -
Duration: Sep 22 2004Sep 24 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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