Synthesis and luminescent properties of CaIn2O4:xTb nanocrystals

Khatkar, S.P.; Han, Sang Do; Taxak, V.B.; Sharma, Gaurav; Kumar, Dinesh

doi:10.1016/j.cap.2006.01.037

Cited by 6 publications

(6 citation statements)

References 13 publications

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“…Also, no peak corresponding to euprium compounds has been observed, demonstrating that Eu 3+ ions are dispersed in SrY 1.7 B 0.3 O 4 matrix. The crystallite size of the SrY 1.7-x B 0.3 O 4 :xEu 3+ particles has been calculated by Debye Scherrer equation [14]:…”

Section: Resultsmentioning

confidence: 99%

Combustion Synthesis and Photoluminescence Characteristics of SrY_1.7B_0.3O₄: Eu Nanoparticles

et al. 2011

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A novel red light emitting nano-sized Eu 3+ doped SrY 1.7 B 0.3 O 4 phosphor were synthesized by combustion method using urea as a fuel. Comparing with traditional material processing techniques, combustion method is a relatively simple method. The advantages of low temperature solution base process have been exploited to produce SrY 1.7 B 0.3 O 4 :Eu nanoparticles. The nano crystals obtained through combustion method was characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) technique and photoluminescence (PL) spectra. This red emission has been assigned to the transition [ 5 D 0 → 7 F 2 ] at 612 nm of Eu 3+ ions. In addition the dependence of the luminescence intensity on Eu 3+ ions concentrations and effect of heat treatment on the particle size of the nanocrystals have also been discussed. The present work reports to achieve the homogenous incorporation of dopants and large scale productions of the nanophosphor in a short interval of time. The particle size of the nanocrystals was found to be in the range of 30-40nm.

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Section: Resultsmentioning

confidence: 99%

Combustion Synthesis and Photoluminescence Characteristics of SrY_1.7B_0.3O₄: Eu Nanoparticles

et al. 2011

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“…Also, no peak corresponding to terbium compounds has been observed, demonstrating that Tb 3+ ions are dispersed in the Sr 3 Y(PO 4 ) 3 matrix. The crystallite size of the Sr 3 Y(PO 4 ) 3 :Tb 3+ particles has been calculated by the Debye-Scherrer equation [14]:…”

Section: Resultsmentioning

confidence: 99%

“…where β is the width of the pure diffraction profile in radians, λ is the wavelength of the x-rays (0.15405 nm), θ is the diffraction angle, and D is the average diameter of the crystallite [14]. By substituting various peaks into this equation and taking into account the instrumental broadening, the particle size of the as-synthesized phosphor was found to be about 35 nm.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Photoluminescence Characteristics of Sr₃Y_1-x(PO₄)₃:xTb³⁺Nanoparticles

Taxak¹,

Han²,

Kumar³

et al. 2010

ECS Trans.

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In the present work, Tb3+ doped Sr3Y1-x(PO4)3:xTb3+ nanocrystals were synthesized by combustion method using urea as a fuel. Comparing with traditional material processing techniques, combustion method is a relatively simple method. The advantages of low temperature solution base process have been exploited to produce Sr3Y1-x(PO4)3:xTb3+ nanoparticles. The nano crystals obtained through combustion method was characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) technique and photoluminescence (PL) spectra. The predominant green colour of the nanocrystals prepared, under an UV source revealed green luminescence that was attributed to transitions 5D4 → 7F5 of Tb3+ located at 545 nm. The particle size of the nanocrystals was found to be in the range of 35nm.

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“…In addition to the excellent chemical stability, wide band gap semiconducting oxides with active Eu 3+ ion are promising red color phosphors [12,13]. Among these oxide phosphors, indium compounds such as CaIn2O4 [14][15][16][17][18][19][20] and SrIn2O4 [21][22][23][24][25][26][27][28][29] have been reported as excellent host materials for rare earth metal cations doped phosphors. CaIn2O4 is a kind of semiconductor with a reported bandgap of 3.9 eV, and belongs to ordered CaFe2O4 structures with the Pca21 or Pbcm space group and the lattice parameters of a=0.970 nm, b=1.130 nm and c=0.321 nm for Z=4 [30].…”

Section: Introductionmentioning

confidence: 99%

“…CaIn2O4 is a kind of semiconductor with a reported bandgap of 3.9 eV, and belongs to ordered CaFe2O4 structures with the Pca21 or Pbcm space group and the lattice parameters of a=0.970 nm, b=1.130 nm and c=0.321 nm for Z=4 [30]. Several dopant cations such as Tb 3+ [14][15][16] and Pr 3+ [16] for green emission, Dy 3+ [16] for blue-white emission and Eu 3+ for white [17,18], yellow [18], orange [18], reddish orange [20] and red [18,19] emissions under ultraviolet (UV) and/or vacuum-ultraviolet (VUV) excitation have been investigated for developing field emission displays (FEDs), cathode ray tube display (CRTs) and white-LEDs. The chemical composition of these phosphors were mainly designed and synthesized to occupying Ca 2+ sites with the dopant cation in the host CaIn2O4.…”

Section: Introductionmentioning

confidence: 99%

Relationship between Eu3+ substitution sites and photoluminescence properties of SrIn2O4:Eu3+ spinel phosphors

Kang

Thuy

Shimokawa

et al. 2016

Journal of Luminescence

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Eu 3+-doped SrIn2O4 phosphors were synthesized by the solid solution method at 1400 ºC in air. The chemical composition of the phosphors was systematically changed to study the relation between the Eu 3+ substitution site and photoluminescence (PL) properties. Under excitation of the 7 F0→ 5 L6 transition of Eu 3+ at 393 nm, the SrIn2O4:Eu 3+ exhibited dominant red emission peaks at 611, 616 and 623 nm, which are attributed to the electric dipole transition 5 D0→ 7 F2 of Eu 3+. The results of X-ray diffraction analysis combined with PL spectroscopic analysis revealed that Eu 3+ ions occupied two different crystallographic In 3+ sites in the host SrIn2O4, while it was found to be impossible to substitute Sr 2+ with Eu 3+ prior to the Eu 3+ substitution at the In 3+ sites in the SrIn2O4. The intensity of the red emission peaks increased with the total amount of dopant Eu 3+ ion at the two In 3+ sites, and reached a maximum at 25 mol% Eu 3+-doping (SrIn2-xO4:xEu 3+ , x=0.25). Moreover, a small amount (<10 mol%) of Eu 3+ at the Sr 2+ site in the SrIn2-xO4:xEu 3+ was found to contribute to enhance the red emission peak intensity at 616 nm. As a result, the highest red emission intensity evaluated as the total emission peak intensities at the 611, 616 and 623 nm was achieved for Sr0.92In1.75O4:0.33Eu 3+ in which Eu 3+ ion concentrations at the In 3+ and Sr 2+ sites were simultaneously optimized as 25 and 8 mol%, respectively (Sr1-yIn2-xO4:(x+y)Eu 3+ , x=0.25, y=0.08). This red emission intensity was 2.2 times higher than that of the phosphor without contribution of the Eu 3+ at the Sr 2+ site (SrIn2-xO4:xEu 3+ , x=0.25). The critical energy transfer distance of Eu 3+ ion in the Sr0.92In1.75O4:0.33Eu 3+ phosphor was determined to be 0.817 nm, and the electric multipolar interaction was suggested as the dominant mechanism for concentration quenching of PL emission due to Eu 3+ ions in the Eu 3+-doped SrIn2O4 phosphors investigated in this study.

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Synthesis and luminescent properties of CaIn2O4:xTb nanocrystals

Cited by 6 publications

References 13 publications

Combustion Synthesis and Photoluminescence Characteristics of SrY_1.7B_0.3O₄: Eu Nanoparticles

Combustion Synthesis and Photoluminescence Characteristics of SrY_1.7B_0.3O₄: Eu Nanoparticles

Synthesis and Photoluminescence Characteristics of Sr₃Y_1-x(PO₄)₃:xTb³⁺Nanoparticles

Relationship between Eu3+ substitution sites and photoluminescence properties of SrIn2O4:Eu3+ spinel phosphors

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Synthesis and luminescent properties of CaIn2O4:xTb nanocrystals

Cited by 6 publications

References 13 publications

Combustion Synthesis and Photoluminescence Characteristics of SrY1.7B0.3O4: Eu Nanoparticles

Combustion Synthesis and Photoluminescence Characteristics of SrY1.7B0.3O4: Eu Nanoparticles

Synthesis and Photoluminescence Characteristics of Sr3Y1-x(PO4)3:xTb3+Nanoparticles

Relationship between Eu3+ substitution sites and photoluminescence properties of SrIn2O4:Eu3+ spinel phosphors

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Combustion Synthesis and Photoluminescence Characteristics of SrY_1.7B_0.3O₄: Eu Nanoparticles

Combustion Synthesis and Photoluminescence Characteristics of SrY_1.7B_0.3O₄: Eu Nanoparticles

Synthesis and Photoluminescence Characteristics of Sr₃Y_1-x(PO₄)₃:xTb³⁺Nanoparticles