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 journalArticle

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

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Powders
Nanoparticles
Photoluminescence
photoluminescence
Ions
nanoparticles
Optics and Photonics
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Polymethyl Methacrylate
ions
Surface defects
surface defects
Gels
Perovskite
Nanocrystals
Photonics
Electron energy levels
Sol-gel process
Rare earths
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Keywords

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

ASJC Scopus subject areas

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

Cite this

Enhanced stokes and anti-stokes photoluminescence emission from LaAlO 3 : Nd+ 3 nanosized powder coated with a SiO 2 shell layer. / Atabaev, Timur Sh; Piao, Zhonglie; Kim, Hyung Kook; Hwang, Yoon Hwae; Kim, Beomkeun.

In: Journal of Nanoscience and Nanotechnology, Vol. 11, No. 7, 07.2011, p. 5892-5897.

Research output: Contribution to journalArticle

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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.",
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