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Title: Enhanced Pr{sup 3+} photoluminescence by energy transfer in SrF{sub 2} : Eu{sup 2+}, Pr{sup 3+} phosphor

Efficient energy transfer was demonstrated in the SrF{sub 2} : Eu{sup 2+}, Pr{sup 3+} phosphor synthesized by the co-precipitation method. Results obtained with X-ray diffraction (XRD), scanning electron microscopy (SEM), x-ray spectroscopy (XPS), photoluminescence (PL) and decay curves proposed the UV-Vis energy transfer process. The energy transfer process between the Eu{sup 2+} and Pr{sup 3+} ions in SrF{sub 2} was investigated to evaluate the potential of the Eu{sup 2+} ion as a sensitizer for the Pr{sup 3+} ion. The results proposed that Eu{sup 2+} could be a good sensitizer for absorbing the UV photons and efficiently enhancing the Pr{sup 3+} emission intensity. The energy transfer process was effective until concentration quenching for the Pr{sup 3+} ions occurred. The concentration quenching was attributed to cross-relaxation between the Pr{sup 3+} ions.
Authors:
; ;  [1] ;  [2]
  1. Department of Physics, University of the Free State, PO Box 339, Bloemfontein, ZA9300 (South Africa)
  2. Department of Physics, Chemistry and Biology, Linköping University, Linköping (Sweden)
Publication Date:
OSTI Identifier:
22492436
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 2; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CONCENTRATION RATIO; COPRECIPITATION; EMISSION SPECTROSCOPY; ENERGY TRANSFER; EUROPIUM IONS; PHOTOLUMINESCENCE; PHOTONS; POTENTIALS; PRASEODYMIUM IONS; RELAXATION; SCANNING ELECTRON MICROSCOPY; STRONTIUM FLUORIDES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY; X-RAY SPECTROSCOPY