Syntheses of optically efficient (La1-x-yCexTby)F3 nanocrystals via a hydrothermal method

Qiang Wang, Yumin You, Richard D. Ludescher, Yiguang Ju

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Optically efficient cerium and terbium doped lanthanide fluoride (La1-x-yCexTby)F3 nanocrystals with different doping concentrations have been synthesized by a hydrothermal route in the presence of ethylenediamine tetraacetic acid disodium salt (EDTA). The results showed that the formation of nanocrystals with different morphologies depends on terbium ion Tb3+ doping concentration, but independent of cerium ion Ce3+ doping concentration. With increase in Tb3+ doping concentration, the morphologies of nanocrystals evolved from a spherical shape to a plated-like one. In addition, both the photoluminescence quantum yield (PL QY) and the fluorescence lifetime of nanocrystals increased with the increase in Ce3+ doping concentration in cerium and terbium co-doped system. The PL QY reached up to 55%, and the lifetime up to 7.3 ms. Transmission electron microscopy (TEM), X-ray diffraction (XRD), selected area electron diffraction (SAED), X-ray fluorescence (XRF), energy dispersive spectroscopy (EDS), ultraviolet-visible (UV-vis) absorption, photoluminescence (PL) and infrared (IR) spectroscopies were employed to characterize the properties of nanocrystals. The growth mechanism of nanocrystals with different morphologies and optical properties of nanocrystals with different doping concentrations were investigated.

Original languageEnglish (US)
Pages (from-to)1076-1084
Number of pages9
JournalJournal of Luminescence
Volume130
Issue number6
DOIs
StatePublished - Jun 2010

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Keywords

  • Fluorescence lifetime
  • Hydrothermal
  • Lanthanide fluoride
  • Nanomaterials
  • Photoluminescence
  • Quantum yield
  • UV nanophosphors
  • X-ray nanophosphors

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