Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2

Archana K. Munirathnappa, Joerg C. Neuefeind, Premakumar Yanda, A. Sundaresan, I. V. Kityk, K. Ozga, J. Jedryka, P. Poornesh, Ashok Rao, Nalini G. Sundaram

Research output: Contribution to journalArticle

Abstract

Phase pure nanoparticles of NaCe(WO4)2 green phosphor were synthesized via a template-free solvothermal method using water (NaCeW-a) and ethylene glycol (NaCeW-b) as reaction solvents. Rietveld refinements using powder neutron diffraction (NPD) data confirms that both NaCeW-a and NaCeW-b crystallize in the Scheelite-like tetragonal I41/a space group. However, local structure analysis using total scattering atomic pair distribution function (PDF) refinements in a shorter 'r' range (1.5 to 10 Å) established the noncentrosymmetric I4̄ space group where Na/CeO8 polyhedra are slightly distorted, distributed in 2b and 2d sites. The interesting observation of noncentrosymmetry locally in both NaCeW-a and NaCeW-b is supported by optical nonlinear second harmonic generation (SHG) measurements. Closer inspection of the scanning electron micrograms showed a distinct difference in the particle morphology as a function of reaction solvent. Observation of the +3 valence state of the cerium ion in NaCe(WO4)2 via X-ray photoelectron spectroscopy measurements was further corroborated by magnetic (VSM) measurements. In addition, both the samples emitted bright narrow green emission upon UV excitation with no considerable change in emission intensity with respect to solvent. Hence, the sharp green light emission and SHG properties make the NaCe(WO4)2 a potential candidate for solid state display and nonlinear optical applications.

Original languageEnglish
JournalCrystal Growth and Design
DOIs
Publication statusAccepted/In press - 01-01-2019

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scheelite
Photoluminescence
Harmonic generation
photoluminescence
harmonic generations
Cerium
Rietveld refinement
Neutron powder diffraction
Ethylene Glycol
Light emission
Magnetic variables measurement
Ethylene glycol
polyhedrons
cerium
Phosphors
phosphors
magnetic measurement
Distribution functions
light emission
neutron diffraction

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Munirathnappa, A. K., Neuefeind, J. C., Yanda, P., Sundaresan, A., Kityk, I. V., Ozga, K., ... Sundaram, N. G. (Accepted/In press). Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2. Crystal Growth and Design. https://doi.org/10.1021/acs.cgd.9b00041
Munirathnappa, Archana K. ; Neuefeind, Joerg C. ; Yanda, Premakumar ; Sundaresan, A. ; Kityk, I. V. ; Ozga, K. ; Jedryka, J. ; Poornesh, P. ; Rao, Ashok ; Sundaram, Nalini G. / Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2. In: Crystal Growth and Design. 2019.
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Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2. / Munirathnappa, Archana K.; Neuefeind, Joerg C.; Yanda, Premakumar; Sundaresan, A.; Kityk, I. V.; Ozga, K.; Jedryka, J.; Poornesh, P.; Rao, Ashok; Sundaram, Nalini G.

In: Crystal Growth and Design, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2

AU - Munirathnappa, Archana K.

AU - Neuefeind, Joerg C.

AU - Yanda, Premakumar

AU - Sundaresan, A.

AU - Kityk, I. V.

AU - Ozga, K.

AU - Jedryka, J.

AU - Poornesh, P.

AU - Rao, Ashok

AU - Sundaram, Nalini G.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Phase pure nanoparticles of NaCe(WO4)2 green phosphor were synthesized via a template-free solvothermal method using water (NaCeW-a) and ethylene glycol (NaCeW-b) as reaction solvents. Rietveld refinements using powder neutron diffraction (NPD) data confirms that both NaCeW-a and NaCeW-b crystallize in the Scheelite-like tetragonal I41/a space group. However, local structure analysis using total scattering atomic pair distribution function (PDF) refinements in a shorter 'r' range (1.5 to 10 Å) established the noncentrosymmetric I4̄ space group where Na/CeO8 polyhedra are slightly distorted, distributed in 2b and 2d sites. The interesting observation of noncentrosymmetry locally in both NaCeW-a and NaCeW-b is supported by optical nonlinear second harmonic generation (SHG) measurements. Closer inspection of the scanning electron micrograms showed a distinct difference in the particle morphology as a function of reaction solvent. Observation of the +3 valence state of the cerium ion in NaCe(WO4)2 via X-ray photoelectron spectroscopy measurements was further corroborated by magnetic (VSM) measurements. In addition, both the samples emitted bright narrow green emission upon UV excitation with no considerable change in emission intensity with respect to solvent. Hence, the sharp green light emission and SHG properties make the NaCe(WO4)2 a potential candidate for solid state display and nonlinear optical applications.

AB - Phase pure nanoparticles of NaCe(WO4)2 green phosphor were synthesized via a template-free solvothermal method using water (NaCeW-a) and ethylene glycol (NaCeW-b) as reaction solvents. Rietveld refinements using powder neutron diffraction (NPD) data confirms that both NaCeW-a and NaCeW-b crystallize in the Scheelite-like tetragonal I41/a space group. However, local structure analysis using total scattering atomic pair distribution function (PDF) refinements in a shorter 'r' range (1.5 to 10 Å) established the noncentrosymmetric I4̄ space group where Na/CeO8 polyhedra are slightly distorted, distributed in 2b and 2d sites. The interesting observation of noncentrosymmetry locally in both NaCeW-a and NaCeW-b is supported by optical nonlinear second harmonic generation (SHG) measurements. Closer inspection of the scanning electron micrograms showed a distinct difference in the particle morphology as a function of reaction solvent. Observation of the +3 valence state of the cerium ion in NaCe(WO4)2 via X-ray photoelectron spectroscopy measurements was further corroborated by magnetic (VSM) measurements. In addition, both the samples emitted bright narrow green emission upon UV excitation with no considerable change in emission intensity with respect to solvent. Hence, the sharp green light emission and SHG properties make the NaCe(WO4)2 a potential candidate for solid state display and nonlinear optical applications.

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U2 - 10.1021/acs.cgd.9b00041

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