Optical characterization of infrared emitting rare-earth-doped fluoride nanocrystals and their transparent nanocomposites

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

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Abstract

Nanocrystalline LaF3:Nd and CaF2:Er with rare-earth concentrations ranging from 0.5 to 16.7 mol % and dispersible particle sizes less than 100 nm were synthesized by solvothermal synthesis. Optical absorption, emission, and quantum efficiency were measured for the nanocrystals. Dopant levels of 0.5 mol % rare earth exhibited the best emission characteristics, with maximum quantum efficiencies of 95 and 51% for LaF3:Nd and CaF 2:Er, respectively. The nanopowders were suspended in PFCB (6F variant) polymer-in-toluene solutions to make transparent suspensions that could be cast to make transparent nanocomposites. Scattering analysis indicates that the excellent transmission can be attributed to nanocrystals dispersed in the composite at length scales less than 100 nm.

Original languageEnglish (US)
Pages (from-to)1523-1528
Number of pages6
JournalChemistry of Materials
Volume19
Issue number6
DOIs
Publication statusPublished - Mar 20 2007

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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