Jump to main content
Jump to site search


Luminescence and energy transfer in β-NaGdF4:Eu3+,Er3+ nanocrystalline samples from a room temperature synthesis

Author affiliations

Abstract

Phase pure hexagonal β-NaGdF4:Eu3+,Er3+ samples of less than 10 nm in crystallite size were synthesized in anhydrous ethylene glycol within 24 hours at room temperature. The materials were characterized by powder X-ray diffraction, electron microscopy, and luminescence spectroscopy. After Gd3+ excitation at 273 nm Eu3+ luminescence from the 5DJ states dominates over Gd3+ 6PJ emission and only weak Er3+ emissions could be observed due to strong Gd→Eu and weak Gd→Er energy transfer. Excitation at 377 nm results in Er3+ 2H9/2 and Eu3+ 5DJ emissions. The concentration dependence of the Er3+ and Eu3+ luminescence intensities points to independent behavior of the dopant ions without Er→Eu or Eu→Er energy transfer. Eu3+ excitation at 394 nm results in Eu3+ 5DJ emissions only and confirms the absence of Eu→Er energy transfer. Eu3+ luminescence from the 5DJ states prevails for all investigated excitations. The optimum Eu3+ doping level is close to 5%. Significant Er3+ luminescence was observed for 377 nm excitation only. The strong 2H9/2 and weak 4S3/2 Er3+ emissions indicate small losses by multiphonon relaxation and a good quality of the nanomaterial. Er co-doping hinders the energy migration on the Gd3+ and Eu3+ sublattices which results in higher Gd3+/Eu3+ and Eu3+ 5D1/5D0 emission ratios.

Graphical abstract: Luminescence and energy transfer in β-NaGdF4:Eu3+,Er3+ nanocrystalline samples from a room temperature synthesis

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Aug 2017, accepted on 20 Nov 2017 and first published on 21 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03242K
Citation: New J. Chem., 2018, Advance Article
  •   Request permissions

    Luminescence and energy transfer in β-NaGdF4:Eu3+,Er3+ nanocrystalline samples from a room temperature synthesis

    G. Tessitore, A. Mudring and K. W. Krämer, New J. Chem., 2018, Advance Article , DOI: 10.1039/C7NJ03242K

Search articles by author

Spotlight

Advertisements