Spectroscopic studies of solvothermally derived LaF 3:Nd nanocrystals

G. A. Kumar, C. W. Chen, Richard Riman

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

LaF 3:Nd (0.5-10.7 mol%) nanocrystals were solvothermally synthesized and their optical properties were studied. Judd-Ofelt parameterization of the absorption spectra gave a radiative decay time of 846 μs for the 4F 3/2 excited state to the four emission channels. Measured fluorescence decay curves for 5 different Nd 3+ concentrations were fit with double exponential functions. The decrease in fluorescence decay time shows that concentration quenching is appreciable as the Nd 3+ concentration increases. The 0.5 mol% Nd 3+ concentration shows a decay time of 800 μs and a radiative quantum efficiency of 95%. For all dopant concentrations, heat-treatment (800 °C, 2 h) substantially increased the emission intensity by 2 to 3-orders of magnitude. This emission intensity increase is attributed to reduction in hydroxyls and homogenization of the Nd 3+ coordination environment through improved crystalline perfection of the LaF 3 :Nd lattice.

Original languageEnglish (US)
Pages (from-to)6558-6563
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume8
Issue number12
DOIs
StatePublished - Dec 1 2008

All Science Journal Classification (ASJC) codes

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

Keywords

  • Fluorescence
  • Nanocrystals
  • Oscillator strength
  • Quantum efficiency
  • Rare earth
  • Solvothermal synthesis

Fingerprint Dive into the research topics of 'Spectroscopic studies of solvothermally derived LaF <sub>3</sub>:Nd nanocrystals'. Together they form a unique fingerprint.

Cite this