Local-site cation ordering of Eu3+ ion in doped PbTiO3

Méndez-González, Y.; Pentón-Madrigal, A.; Peláiz‐Barranco, A.; Figueroa, Santiago; Oliveira, L. A. S. de; Concepción-Rosabal, Beatriz

doi:10.1016/j.physb.2013.11.035

Cited by 10 publications

(13 citation statements)

References 24 publications

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“…7,15,32 In A 2 B B O 6 perovskite, the frameworks are formed by corner-shared octahedra B O 6 and B O 6 , in which the large A-cations occupy the AO 12 cuboctahedral cavity. 14,15 As is known, cation ions on B sites with smaller ionic radius are regular and centrosymmetric; however, A sites are random and disordered distribution in double perovskite lattices.…”

Section: The Microstructures Of Eu 3+ Ions In Double Tellurium Perovsmentioning

confidence: 99%

Photoluminescence Characteristics of Eu³⁺-Doped Double-Perovskite Phosphors

Wang

Chen

et al. 2014

ECS J. Solid State Sci. Technol.

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Eu 3+ -doped triple tellurium double perovskites LiBaLa [TeO 6 ], NaBaLa [TeO 6 ], LiBaBi [TeO 6 ] and NaCaBi [TeO 6 ] were synthesized by the general high temperature solid-state reaction. The crystal phase formations and morphology of the phosphates were confirmed by X-ray powder diffraction (XRD) and scanning electron microscope (SEM) measurements, respectively. The luminescence properties, including the photoluminescence (PL) excitation and emission spectra, decay curves (lifetimes), the color coordinates and the internal quantum efficiency (QE) were investigated. Eu 3+ -doped LiBaLa[TeO 6 ], NaBaLa[TeO 6 ], and LiBaBi[TeO 6 ] show the dominated electric dipole transition 5 D 0 → 7 F 2 with a pure red luminescence color and a fast decay. However, Eu 3+ -doped NaCaBi[TeO 6 ] presents the dominant reddish-orange emission from magnetic dipole transition 5 D 0 → 7 F 1 and a longer luminescence lifetime. The different luminescence features were discussed on the base of crystal structure, where Eu 3+ ions have two possible substitutions on A or B sites in double tellurium perovskites.ABO 3 compounds with perovskite structure are the most studied ferroelectric materials in the past years. 1-6 This well-known structure has a three-dimensional corner-sharing network of BO 6 octahedra with a large A-cation cavity occupying the AO 12 cuboctahedral. It is an important way to obtain high density samples with near optimal piezoelectric properties by doping rare earth ions (RE) in perovskites. 7 This brings another important research topic for perovskites, i.e., the luminescence properties. RE-doped perovskites as Eu 3+ -doped CaTiO 3 , 8,9 BaZrO 3 , 10 PbTiO 3 , 7 etc, have promising applications in luminescence and displays. [11][12][13] The great flexibility of A and B sites in ABO 3 allows very rich substitutions. This induces a large number of isotopic compounds with perovskite structure such as double perovskite oxides with a general formula A 2 B B O 6 in which B O 6 and B O 6 octahedra are corner-shared alternately. This framework forms cube-octahedral cavities filled by A-site cations. 14,15 Eu 3+ -doped double perovskite oxides have been given great attentions because of the possible applications as luminescence materials such as MgTiO 6 :Eu 3+ , 23 A 2 CaMoO 6 (A = Sr, Ba), 15 A 2 CaWO 6 (A = Sr, Ba) and Sr 1.9−x Ba x Eu 0.05 Li 0.05 MoO 6 (x = 0-1.9). 24 Eu 3+ -doped double perovskites have a broad excitation band ranging from ultraviolet to visible light region, and show efficient red luminescence. The studies have shown that the emission intensity of Eu 3+ -doped Sr 2 CaMoO 6 is 1.5 times higher than that of commercial Y 2 O 2 S:Eu 3+ ; 15 Sr 1.5 Eu 0.05 Li 0.05 Ba 0.4 CaWO 6 has 4.5 times stronger luminescence intensity than that of commercial red phosphor (Nichia) under 465 nm excitation. 24 In this study, new red-emitting phosphors of Eu 3+ -doped tellurium perovskites LiBaLa[TeO 6 ], NaBaLa[TeO 6 ], LiBaBi[TeO 6 ] and NaCaBi[TeO 6 ] were synthesized by the conventional high temperature solid state reac...

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Section: The Microstructures Of Eu 3+ Ions In Double Tellurium Perovsmentioning

confidence: 99%

Photoluminescence Characteristics of Eu³⁺-Doped Double-Perovskite Phosphors

Wang

Chen

et al. 2014

ECS J. Solid State Sci. Technol.

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“…The structure data were taken from the “Inorganic Crystal Structure Database” (ICSD) (FIZ Karlsruhe, 2014). In the initial structural model, the experimental evidence from the Raman spectra and the results of the previous structural studies suggesting the incorporation of the lanthanide ions at both A and B sites have been considered (Mackie et al , 2010; Mendez-González et al , 2010, 2014; Peláiz-Barranco et al , 2010, 2012). The general nominal composition was Pb 0.94 Ln 0.04 Ti 0.96 Ln 0.04 O 2.98 taking into account that the initial occupancy of Ln 3+ at B site should be in correspondence with the calculated tolerance factor value for these compositions (Mendez-González et al , 2010, 2014; Peláiz-Barranco et al , 2012).…”

Section: Resultsmentioning

confidence: 99%

“…The incorporation of rare-earth ions into A and/or B sites is an issue of interest in perovskite oxides titanates (García-Zaldívar et al , 1997; Buscaglia et al , 2000, 2002, 2004; Peláiz-Barranco et al , 2009, 2010, 2012; Mackie et al , 2010; Mendez-González et al , 2010, 2014). Previous studies, in BT ceramics, have shown that Ba 2+ can be substituted by La 3+ and Pr 3+ ions, while fractional occupancy of Gd 3+ and Tb 3+ at the B site has been predicted (Buscaglia et al , 2000).…”

Section: Introductionmentioning

confidence: 99%

“…In PT ceramics, which has been modified with 2 and 8 at% of La 3+ ions, the behavior of the tetragonal distortion and the transition temperature has been found to be consistent with the A -site substitution, while the results for Sm 3+ , Eu 3+ , Gd 3+ , and Dy 3+ ions have suggested the incorporation at both A and B sites (Mendez-González et al , 2010; Peláiz-Barranco et al , 2010, 2012). Recently, a structural study using the extended X-ray absorption fine structure technique and Rietveld refinement on a PT compound modified with 8 at% of Eu 3+ has shown the incorporation of this ion at both sites of the perovskite structure (Mendez-González et al , 2014). Indirect evidence on the possible incorporation of lanthanide elements at both crystallographic sites has been established from positron annihilation lifetime spectroscopy measurements on rare-earth-doped PT ceramics (Peláiz-Barranco et al , 2012).…”

Section: Introductionmentioning

confidence: 99%

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Study ofAandBsites order in lanthanide-doped lead titanate ferroelectric system

et al. 2016

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Pb0.88Ln0.08TiO3ferroelectric system, whereLn= La, Sm, Eu, and Dy, has been characterized using Scanning Electron Microscopy, Raman spectroscopy, and X-ray diffraction experiments. Softening of the lowest transverse optical phonon modeE(1TO) was evaluated as a function of the rare earths’ ionic radius suggesting partial occupation of lanthanide ions at theAandBsites of the perovskite structure. Using Rietveld refinements, it has been established a higher incorporation of Ln3+ions into theAsites of the perovskite structure than that of theBsites for the studied ceramics. The occupation atBsites increases slightly with the decreases of the ionic radii of the lanthanides.

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“…X-ray diffraction and extended X-ray absorption fine structure experiments in the (Pb 0:88 Eu 0:08 )TiO 3 ceramic have also showed that Eu 3þ ions substitute to Pb 2þ and Ti 4þ ions at A-and B-sites of the ABO 3 structure, respectively. 13 The present study will provide more insight concerning the incorporation of dysprosium into A-and/or B-sites of the PT perovskite structure. The dysprosium-doped PT system will be studied considering two nominal equations: (i) (Pb 0:88 Dy 0:08 )TiO 3 , dysprosium substitutes for Pb 2þ (labeled as PT8Dy); (ii) Pb(Ti 0:92 Dy 0:08 )O 2:96 , dysprosium substitutes for Ti 4þ (labeled as PTDy8).…”

Section: Introductionmentioning

confidence: 84%

Incorporation of dysprosium ions into PbTiO₃ ferroelectric ceramic system

et al. 2015

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A structural analysis concerning the incorporation of dysprosium into A-and/or B-sites of the lead titanate is shown. The two \boundary" refinements are presented, i.e., Dy 2þ substitutes for Pb 2þ (Dy 3þ substitutes for Ti 4þ ) and Dy 3þ substitutes for Pb 2þ (Dy 3þ substitutes for Ti 4þ ). The results offer quantitative information about the incorporation into both crystallographic sites. The increase of Dy 3þ fraction into B-site provides the increase of the Ti 4þ atomic displacement along the [001] direction and the tetragonal distortion.

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Local-site cation ordering of Eu3+ ion in doped PbTiO3

Cited by 10 publications

References 24 publications

Photoluminescence Characteristics of Eu³⁺-Doped Double-Perovskite Phosphors

Photoluminescence Characteristics of Eu³⁺-Doped Double-Perovskite Phosphors

Study ofAandBsites order in lanthanide-doped lead titanate ferroelectric system

Incorporation of dysprosium ions into PbTiO₃ ferroelectric ceramic system

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Local-site cation ordering of Eu3+ ion in doped PbTiO3

Cited by 10 publications

References 24 publications

Photoluminescence Characteristics of Eu3+-Doped Double-Perovskite Phosphors

Photoluminescence Characteristics of Eu3+-Doped Double-Perovskite Phosphors

Study ofAandBsites order in lanthanide-doped lead titanate ferroelectric system

Incorporation of dysprosium ions into PbTiO3 ferroelectric ceramic system

Contact Info

Product

Resources

About

Photoluminescence Characteristics of Eu³⁺-Doped Double-Perovskite Phosphors

Photoluminescence Characteristics of Eu³⁺-Doped Double-Perovskite Phosphors

Incorporation of dysprosium ions into PbTiO₃ ferroelectric ceramic system