Luminescence kinetics of low temperature nano ZnTiO3:Eu3+ red spinel under NUV excitation

The present study discusses the synthesis and characterization of rare form of low temperature cubic spinel phase of ZnTiO 3 , whose synthesis is a challenging task for researchers. Powder XRD pattern confirms the formation of single phase spinel form of ZnTiO 3 crystallizes in cubic lattice. The av...

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Published in:Journal of materials science. Materials in electronics 2019-06, Vol.30 (11), p.10673-10685
Main Authors: Bhagyalekshmi, G. L., Neethu Sha, A. P., Rajendran, Deepthi N.
Format: Article
Language:English
Subjects:
Antisymmetry
Characterization and Evaluation of Materials
Chemistry and Materials Science
Color
Crystal defects
Crystallites
Cubic lattice
Dependence
Electric dipoles
Emission analysis
Emission spectra
Europium
Excitation
Low temperature
Materials Science
Nanophosphors
Optical and Electronic Materials
Photoluminescence
Spectrum analysis
Spinel
Synthesis
X ray photoelectron spectroscopy
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cited_by cdi_FETCH-LOGICAL-c249t-2a32ccfa9411bd15f9732923d9b805031efc7ca739d0a0b8537623cf39a6e4e03
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container_title Journal of materials science. Materials in electronics
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creator Bhagyalekshmi, G. L.
Neethu Sha, A. P.
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description The present study discusses the synthesis and characterization of rare form of low temperature cubic spinel phase of ZnTiO 3 , whose synthesis is a challenging task for researchers. Powder XRD pattern confirms the formation of single phase spinel form of ZnTiO 3 crystallizes in cubic lattice. The average crystallite size obtained from TEM analysis and Scherrer’ method is about 7–8 nm. Trivalent Eu ions in host lattice are confirmed by XPS spectroscopy. Photoluminescence spectral analysis infers that ZnTiO 3 :xEu 3+ (x = 0.25%, 0.5%, 0.75%, 1%, 1.25%) nanophosphors show strong red emission corresponding to the forced electric dipole transition 5 D 0 – 7 F 2 under near UV excitation. Hypersensitive 5 D 0 – 7 F 2 transition indicates inversion antisymmetry crystal field around Eu 3+ environment, favourable to improve red color purity. The type of multipolar interaction responsible for florescence quenching is also discussed. The color co-ordinate of all samples estimated from emission spectra is comparable to the national television standard committee value of red emission. The compositional dependence of Judd–Offlet parameters were evaluated and discussed. Eu doped spinels with defects associated structure shows better luminescent LED applications.
doi_str_mv 10.1007/s10854-019-01413-x
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Hypersensitive 5 D 0 – 7 F 2 transition indicates inversion antisymmetry crystal field around Eu 3+ environment, favourable to improve red color purity. The type of multipolar interaction responsible for florescence quenching is also discussed. The color co-ordinate of all samples estimated from emission spectra is comparable to the national television standard committee value of red emission. The compositional dependence of Judd–Offlet parameters were evaluated and discussed. 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subjects Antisymmetry
Characterization and Evaluation of Materials
Chemistry and Materials Science
Color
Crystal defects
Crystallites
Cubic lattice
Dependence
Electric dipoles
Emission analysis
Emission spectra
Europium
Excitation
Low temperature
Materials Science
Nanophosphors
Optical and Electronic Materials
Photoluminescence
Spectrum analysis
Spinel
Synthesis
X ray photoelectron spectroscopy
title Luminescence kinetics of low temperature nano ZnTiO3:Eu3+ red spinel under NUV excitation
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