Yan Zhang - Academia.edu (original) (raw)
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Council for Scientific and Industrial Research (CSIR)
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A series of Tb 3+ , Eu 3+ -doped Sr 2 MgSi 2 O 7 (SMSO) phosphors were synthesized by high temper... more A series of Tb 3+ , Eu 3+ -doped Sr 2 MgSi 2 O 7 (SMSO) phosphors were synthesized by high temperature solid-state reaction. X-ray diffraction (XRD) patterns, Rietveld refinement, photoluminescence spectra (PL), and luminescence decay curves were utilized to characterize each sample's properties. Intense green emission due to Tb 3+ 5 D 4 → 7 F 5 transition was observed in the Tb 3+ single-doped SMSO sample, and the corresponding concentration quenching mechanism was demonstrated to be a diople-diople interaction. A wide overlap between Tb 3+ emission and Eu 3+ excitationspectraresults in energy transfer from Tb 3+ to Eu 3+ . This has been demonstrated by the emission spectra and decay curves of Tb 3+ in SMSO:Tb 3+ , Eu 3+ phosphors. Energy transfer mechanism was determined to be a quadrupole-quadrupole interaction. And critical distance of energy transfer from Tb 3+ to Eu 3+ ions is calculated to be 6.7 Å on the basis of concentration quenching method. Moreover, white light emission was generated via adjusting concentration ratio of Tb 3+ and Eu 3+ in SMSO:Tb 3+ , Eu 3+ phosphors. All the results indicate that SMSO:Tb 3+ , Eu 3+ is a promising single-component white light emitting phosphor.
A series of Tb 3+ , Eu 3+ -doped Sr 2 MgSi 2 O 7 (SMSO) phosphors were synthesized by high temper... more A series of Tb 3+ , Eu 3+ -doped Sr 2 MgSi 2 O 7 (SMSO) phosphors were synthesized by high temperature solid-state reaction. X-ray diffraction (XRD) patterns, Rietveld refinement, photoluminescence spectra (PL), and luminescence decay curves were utilized to characterize each sample's properties. Intense green emission due to Tb 3+ 5 D 4 → 7 F 5 transition was observed in the Tb 3+ single-doped SMSO sample, and the corresponding concentration quenching mechanism was demonstrated to be a diople-diople interaction. A wide overlap between Tb 3+ emission and Eu 3+ excitationspectraresults in energy transfer from Tb 3+ to Eu 3+ . This has been demonstrated by the emission spectra and decay curves of Tb 3+ in SMSO:Tb 3+ , Eu 3+ phosphors. Energy transfer mechanism was determined to be a quadrupole-quadrupole interaction. And critical distance of energy transfer from Tb 3+ to Eu 3+ ions is calculated to be 6.7 Å on the basis of concentration quenching method. Moreover, white light emission was generated via adjusting concentration ratio of Tb 3+ and Eu 3+ in SMSO:Tb 3+ , Eu 3+ phosphors. All the results indicate that SMSO:Tb 3+ , Eu 3+ is a promising single-component white light emitting phosphor.