Effect of host composition and Eu 3+  concentration on the photoluminescence of aluminosilicate (Ca,Sr) 2 Al 2 SiO 7 :Eu 3+  phosphors

Park, K.; Kim, H.; Hakeem, D.A.

doi:10.1016/j.dyepig.2016.08.022

Cited by 62 publications

(10 citation statements)

References 39 publications

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“…If discuss an opportunity for studied compounds to be used as phosphor materials we have to note, that described above Ca‐induced formation of the two types of the luminescence centers influences color characteristics of their luminescence. In fact, it is known that qualitative evaluation of the light color of the studied Eu 3+ ions containing compounds can be made by analysis of the ratio of the intensity of luminescence caused by 5 D 0 → 7 F 2 and 5 D 0 → 7 F 1 radiation transitions, I( 5 D 0 → 7 F 2 )/I( 5 D 0 → 7 F 1 ), as these transitions are conditionally responsible for the red and orange emission color, respectively . The results of this ratio analysis are accumulated in the Table .…”

Section: Luminescent Propertiesmentioning

confidence: 99%

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Synthesis and Investigation of La,Ca ‐Doped EuVO₄ Nanoparticles with Enhanced Excitation by Near Violet Light

Chukova

Nedilko

Slepets

et al. 2018

Physica Status Solidi (a)

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The paper reports experimental results on features of crystal structure and luminescent properties of the Eu1−xCayVO4 nanoparticles synthesized for the first time. The Eu1−xCaxVO4 compounds with x = 0, 0.05, 0.1, 0.15, and 0.20 are prepared by aqueous nitrate–citrate sol–gel synthesis. The obtained samples are characterized by XRD analysis. The Eu1−xCaxVO4 samples are crystallized in tetragonal structure. Phase composition of the sample depends on the x value. Increasing concentrations of the calcium ions leads to formation of the EuVO4 and CaV2O6 phases’ mixture. Luminescence properties of the synthesized Eu1−xCaxVO4 nanoparticles are considered in comparison with properties of the La1−x−yEuyCaxVO4 nanoparticles. Formation of two types of emission centers and arising of additional excitation band near 400 nm are observed for the both compositions. It is shown that second types of the emission centers have different structure and spectral characteristics for the Eu1−xCaxVO4 and La1−x−yEuyCaxVO4 nanoparticles, whereas the 400 nm excitation band has the same origin for the both compositions.

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Section: Luminescent Propertiesmentioning

confidence: 99%

“…7 F 1 ), as these transitions are conditionally responsible for the red and orange emission color, respectively. [33][34][35] The results of this ratio analysis are accumulated in the Table 2. It is easy to see, that Ca À dopant cases increase of the ratio compared to un-doped EuVO 4 sample.…”

Section: Luminescent Propertiesmentioning

confidence: 99%

Synthesis and Investigation of La,Ca ‐Doped EuVO₄ Nanoparticles with Enhanced Excitation by Near Violet Light

Chukova

Nedilko

Slepets

et al. 2018

Physica Status Solidi (a)

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“…[ 21–24 ] Trivalent europium ions (Eu 3+ ) have excellent red emission characteristics and are a very efficient activator of red luminescent substances, they have been widely studied and applied in displays and luminescence engineering. [ 25–31 ] Over the past decade, CaWO 4 :Eu 3+ phosphors have received particular attention because they can be excited efficiently using for example in ultraviolet rays, cathode rays, and X‐rays. They show high efficiency and colour‐adjustable emission through both energy migration and effective energy transfer between the host matrix and the luminescence centre.…”

Section: Introductionmentioning

confidence: 99%

Effects of slight structural distortion on the luminescence performance in (Ca_1‐xEu_x)WO₄ luminescent materials

et al. 2020

Luminescence

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(Ca1‐xEux)WO4 (x = 0–21 mol%) phosphors were prepared using the classical solid‐state reaction method. The influence of Eu3+ ion doping on lattice structure was observed using powder X‐ray diffraction and Fourier transform infrared spectroscopy. Furthermore, under this influence, the luminescence properties of all samples were analyzed. The results clearly illustrated that the element europium was successfully incorporated into the CaWO4 lattice with a scheelite structure in the form of a Eu3+ ion, which introduced a slight lattice distortion into the CaWO4 matrix. These lattice distortions had no effect on phase purity, but had regular effects on the intrinsic luminescence of the matrix and the f–f excitation transitions of Eu3+ activators. When the Eu3+ concentration was increased to 21 mol%, a local luminescence centre of [WO4]2− groups was detected in the matrix and manifested as the decay curves of [WO4]2− groups and luminescence changed from single exponential to double exponential fitting. Furthermore, the excitation transitions of Eu3+ between different energy levels (such as 7F0→5L6, 7F0→5D2) also produced interesting changes. Based on analysis of photoluminescence spectra and the chromaticity coordinates in this study, it could be verified that the nonreversing energy transfer of [WO4]2−→Eu3+ was efficient and incomplete.

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“…8,9 The pc-WLED applications have experienced exponential growth in the areas of indoor and outdoor lighting. 10,11 In past decades, the pc-WLEDs have been fabricated via different approaches. Among these, a blue LED (InGaN) chip coated with cerium-doped yttrium aluminum garnet (YAG:Ce 3+ ) yellow phosphors produced white light.…”

Section: Introductionmentioning

confidence: 99%

Novel high-efficiency Eu³⁺-activated Na₂Gd₂B₂O₇ red-emitting phosphors with high color purity

et al. 2018

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Effect of host composition and Eu 3+ concentration on the photoluminescence of aluminosilicate (Ca,Sr) 2 Al 2 SiO 7 :Eu 3+ phosphors

Cited by 62 publications

References 39 publications

Synthesis and Investigation of La,Ca ‐Doped EuVO₄ Nanoparticles with Enhanced Excitation by Near Violet Light

Synthesis and Investigation of La,Ca ‐Doped EuVO₄ Nanoparticles with Enhanced Excitation by Near Violet Light

Effects of slight structural distortion on the luminescence performance in (Ca_1‐xEu_x)WO₄ luminescent materials

Novel high-efficiency Eu³⁺-activated Na₂Gd₂B₂O₇ red-emitting phosphors with high color purity

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Effect of host composition and Eu 3+ concentration on the photoluminescence of aluminosilicate (Ca,Sr) 2 Al 2 SiO 7 :Eu 3+ phosphors

Cited by 62 publications

References 39 publications

Synthesis and Investigation of La,Ca ‐Doped EuVO4 Nanoparticles with Enhanced Excitation by Near Violet Light

Synthesis and Investigation of La,Ca ‐Doped EuVO4 Nanoparticles with Enhanced Excitation by Near Violet Light

Effects of slight structural distortion on the luminescence performance in (Ca1‐xEux)WO4 luminescent materials

Novel high-efficiency Eu3+-activated Na2Gd2B2O7 red-emitting phosphors with high color purity

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Product

Resources

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Synthesis and Investigation of La,Ca ‐Doped EuVO₄ Nanoparticles with Enhanced Excitation by Near Violet Light

Synthesis and Investigation of La,Ca ‐Doped EuVO₄ Nanoparticles with Enhanced Excitation by Near Violet Light

Effects of slight structural distortion on the luminescence performance in (Ca_1‐xEu_x)WO₄ luminescent materials

Novel high-efficiency Eu³⁺-activated Na₂Gd₂B₂O₇ red-emitting phosphors with high color purity