Enhanced stokes and anti-stokes photoluminescence emission from LaAlO 3: Nd+ 3 nanosized powder coated with a SiO 2 shell layer

Timur Sh Atabaev, Zhonglie Piao, Hyung Kook Kim, Yoon Hwae Hwang, Beomkeun Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The research on and development of materials in the field of rare-earth-ion doped nanocrystals for downconversion and up-conversion emi i v ss eion has bI e n e gn recognized to hold tremendous potential in the areas of photonic and biophotonic applications. In the present manuscript, the comprehensive results of the investigation of Stokes and anti-Stokes photoluminescence emission from the prepared LaAlO 3:Nd +3 nanoparticles synthesiz0 ed via the Pechini-type sol-gel method are presented and explained. The XRD diffraction peaks of the LaAlO 3:Nd +3 nanoparticles can be easily assigned to the cubic-perovskite LaAlO 3 structure. The FESEM image confirms the formation of approximately spherical particles within the range of 80 ±30 nm. The PL results showed that the LaAlO 3 doped with 5% of Nd +3 ions shows the strongest emission. The core-shell structures obviously enhanced the photoluminescence intensity by suppressing the non-radiative emission and surface defects. As they yield the best PL measurement results, the LaAlO 3:0.05Nd +3 nanoparticles were coated with a SiO 2 shell layer, to enhance the photoluminescence emission. The mechanisms that are responsible for the photoluminescence emission process observed in the samples are discussed herein, with the help of the Nd +3 ion Dieke energy level diagram. Power dependence slope measurements were performed to identify the processes involved in the LaAlO 3:Nd +3 up-conversion photoluminescence.

Original languageEnglish
Pages (from-to)5892-5897
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number7
DOIs
Publication statusPublished - Jul 2011
Externally publishedYes

Keywords

  • Core-Shell Structure
  • LaAlO
  • Nanoparticles
  • Perovskite Structure
  • Photoluminescence

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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