Synthesis condition and structural/luminescent properties of CaTiO3:Eu3+ red phosphor

Orihashi, Takuya; Adachi, Sadao

doi:10.1016/j.jallcom.2015.06.200

Cited by 39 publications

(24 citation statements)

References 31 publications

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“…). The fact is in direct contrast to the case of CaTiO 3 :Eu 3+ , where the activation energy of E a ~ 1.0 eV for the Eu 3+ emission intensity is about twice larger than the CaTiO 3 lattice formation energy ( E f ~ 0.4 eV). The latter results suggest that the formation of CaTiO 3 occurs relatively easily at energy of E f ~ 0.4 eV and then Eu 3+ ions move to substitute for the optically active CaTiO 3 lattice site with an energy of E a ~ 1.0 eV.…”

Section: Effects Of Molar Composition and Calcination Temperature On contrasting

confidence: 59%

“…The change in the PL intensity ratio η with T is very unique. In fact, we measured the temperature dependence of the Eu 3+ emission intensity from T = 20 K up to or higher than 300 K in various oxide phosphors (β‐Ga 2 O 3 :Eu 3+ , SnO 2 :Eu 3+ , Tb 3 Ga 5 O 12 :Eu 3+ , CaTiO 3 :Eu 3+ , and EuAlO 3 ), but all these data showed no such unique PL behavior at all.…”

Section: Optical Properties Of Eu2ti2o7 and Eu2tio5 Stoichiometric Comentioning

confidence: 98%

“…The slope of these data gives a value of E f,a ~ 1.4 eV for the Eu 2 TiO 5 lattice formation ( E f ) and an activation energy of Eu 3+ in this host matrix ( E a ). Thus, the “host formation ( E f )” and “Eu 3+ ion activation ( E a )” thermal energies are the same in the stoichiometric phosphors like Eu 2 Ti 2 O 7 and Eu 2 TiO 5 in which all (100%) of the host constituent cations are substituted for the activator ions (Eu 3+ ), but not in the nonstoichiometric phosphors such as CaTiO 3 :Eu 3+ …”

Section: Effects Of Molar Composition and Calcination Temperature On mentioning

confidence: 99%

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Synthesis and Unique Photoluminescence Properties of Eu₂Ti₂O₇ and Eu₂TiO₅

2016

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The europium titania materials, pyrochlore Eu2Ti2O7 and orthorhombic Eu2TiO5, were synthesized from a mixture of Eu2O3 and TiO2 using the solid‐state reaction method. The structural and optical properties of these titania materials were investigated using X‐ray diffraction analysis, photoluminescence (PL) analysis, PL excitation (PLE) spectroscopy, and diffuse reflectance spectroscopy. Temperature dependence of the PL intensity was measured between T = 20 and 450 K and analyzed on the basis of various theoretical models. A remarkable increase in the PL intensity with increasing T was observed in these titania materials at higher temperatures, above ~140 K, and well explained by a trap/reservoir model. Interestingly, a dramatic decrease in the electric‐dipole emission component relative to the magnetic‐dipole one was observed in Eu2Ti2O7 above T ~ 140 K. The schematic energy‐level diagram for Eu3+ in the Eu2Ti2O7 host was proposed for the sake of a better understanding of the PL and PLE processes in this type of phosphorescent material.

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Section: Effects Of Molar Composition and Calcination Temperature On contrasting

confidence: 59%

Section: Optical Properties Of Eu2ti2o7 and Eu2tio5 Stoichiometric Comentioning

confidence: 98%

Section: Effects Of Molar Composition and Calcination Temperature On mentioning

confidence: 99%

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Synthesis and Unique Photoluminescence Properties of Eu₂Ti₂O₇ and Eu₂TiO₅

2016

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“…The Δ E value was 0.34 eV on calculation in Equation . Compared with the reported Δ E s for Eu 3+ ‐activated titanates such as CaTiO 3 :Eu 3+ (150 meV), (Ca, Zn)TiO 3 :Eu 3+ ( E = 0.2876 eV) etc., it can be suggested that La 4‐4x Eu 4x Ti 3 O 12 ( x = 0.01‐0.15) possesses an excellent stability on the thermal quenching.…”

Section: Resultsmentioning

confidence: 77%

Synthesis, structure, and luminescence of Eu³⁺‐activated La₄Ti₃O₁₂nanoparticles with layered perovskite structure

Zhang

Liu

et al. 2018

J Am Ceram Soc

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La4‐4xEu4xTi3O12 (x = 0.01‐0.15) nanoparticles were synthesized via the polymerizable complex method. The X‐ray powder diffraction (XRD) measurements and Rietveld refinements verified that all the samples crystallized in a pure trigonal perovskite structure. La4Ti3O12 has band energy of 3.88 eV, which can be greatly narrowed by Eu3+‐doping. This benefits the red‐shift of the optical absorption from UV‐ to near‐UV wavelength region. La4Ti3O12 has the self‐activated luminescence at room temperature with a broadband centered at 520 nm. La4‐4xEu4xTi3O12 (x = 0.01‐0.15) phosphors present red‐emitting luminescence with the strongest 5D0→7F2 transition at 613 nm. The energy transfer was discussed on the doping concentration. Importantly, the phosphors present dominant absorption in near‐UV region (395 nm). An experimental red‐emitting lamp was fabricated using a 395 nm LED‐chip in combination with the single phosphor of La4‐4xEu4xTi3O12 (x = 0.1). The results indicate that La4‐4xEu4xTi3O12 could be a promising candidate used in solid‐state lighting and display under near UV‐light.

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“…The rare‐earth Eu 3+ ions doped in different host materials can be excited and emit red light because of their characteristic f–f transition . It has been shown that calcium titanate (CaTiO 3 ) acts as an excellent host material for rare‐earth ions doped phosphors, and the photoluminescence (PL) performance is closely related to defects, morphology and synthesis methods of the phosphors . However, nanophosphors show excellent performance compared with the bulk ones.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescence properties of cubic‐shaped Ca_1‐xTiO₃:Eu³⁺ particles

et al. 2018

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In this article Ca TiO :xEu single crystalline particles with a cubic morphology and average size of 248 to 815 nm were synthesized by a solvothermal method. The structural and optical properties of the Ca TiO :xEu cubes were investigated, the formation mechanism of the cubes were analyzed and discussed, and the influence of Eu doping content and cubic size on the photoluminescence were examined. The differences in the photoluminescence between Ca TiO :xEu cubic crystals and nanoparticles was analyzed. It was found that an addition of a small amount of water can substantially reduce the size of the cubes. An obvious red emission band centered at 615 nm was observed under the excitation at 395 nm for the cubes. Our results demonstrate CaTiO cubes are good host materials for designing red phosphors.

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Synthesis condition and structural/luminescent properties of CaTiO3:Eu3+ red phosphor

Cited by 39 publications

References 31 publications

Synthesis and Unique Photoluminescence Properties of Eu₂Ti₂O₇ and Eu₂TiO₅

Synthesis and Unique Photoluminescence Properties of Eu₂Ti₂O₇ and Eu₂TiO₅

Synthesis, structure, and luminescence of Eu³⁺‐activated La₄Ti₃O₁₂nanoparticles with layered perovskite structure

Synthesis and luminescence properties of cubic‐shaped Ca_1‐xTiO₃:Eu³⁺ particles

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Synthesis condition and structural/luminescent properties of CaTiO3:Eu3+ red phosphor

Cited by 39 publications

References 31 publications

Synthesis and Unique Photoluminescence Properties of Eu2Ti2O7 and Eu2TiO5

Synthesis and Unique Photoluminescence Properties of Eu2Ti2O7 and Eu2TiO5

Synthesis, structure, and luminescence of Eu3+‐activated La4Ti3O12nanoparticles with layered perovskite structure

Synthesis and luminescence properties of cubic‐shaped Ca1‐xTiO3:Eu3+ particles

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Product

Resources

About

Synthesis and Unique Photoluminescence Properties of Eu₂Ti₂O₇ and Eu₂TiO₅

Synthesis and Unique Photoluminescence Properties of Eu₂Ti₂O₇ and Eu₂TiO₅

Synthesis, structure, and luminescence of Eu³⁺‐activated La₄Ti₃O₁₂nanoparticles with layered perovskite structure

Synthesis and luminescence properties of cubic‐shaped Ca_1‐xTiO₃:Eu³⁺ particles