Optical studies of Eu3+ doped CaZrO3 phosphor for display device applications

Tiwari, Neha; Kuraria, R.K.; Kuraria, S.R.

doi:10.1016/j.ijleo.2015.08.201

Cited by 20 publications

(6 citation statements)

References 30 publications

(29 reference statements)

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“…The structure and phase purity of the powders can be examined by XRD. The XRD patterns of The size of the Ca 0.98 Eu 0.02 ZrO 3 crystallite was calculated using the Debye Sherer formula [25]:…”

Section: Resultsmentioning

confidence: 99%

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Studies on the photoluminescence and thermoluminescence properties of CaZrO3:xEu3+ phosphor for dosimetric application

Fesharaki

Jalali

Karimi

et al. 2021

Preprint

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Series of CaZrO3:xEu3+ (x=0.01, 0.02, 0.03, 0.04 and 0.05) phosphors have been prepared by low temperature sol-gel auto combustion method. The structure and morphology of the samples were investigated by X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM). The energy-dispersive X-ray spectroscope (EDX) was employed to analyze the elemental composition of the phosphor. The XRD patterns indicated that the sample was single phase at 350 ◦C with a perovskite structure. The optimum temperature for the single- phase and crystalline phosphors of CaZrO3:xEu3+ was 700 ◦C. Study of photoluminescence (PL) at room temperature showed that the phosphors can be excited by light with a wavelength of 391 nm. The results of emission spectrum showed that the red luminescence of CaZrO3:xEu3+ due to electric dipole transition of 5D0→7F2 was dominant at wavelength of 615 nm and weaker transition at wavelength of 590 nm which was due to magnetic dipole transition of 5D0→7F1. For the thermoluminescence (TL) study the prepared sample irradiated by X-ray lamp, the TL curve was then recorded at fixed heating rate of 2 ◦C/s. The TL glow curve showed well single peak at a temperature of 165 ◦C. The effect of Eu3+ concentration at fixed X-ray exposure time was studied and maximum TL occurred at x=0.02. Also the variation of TL intensity with X-ray time (5 to 15 min) showed linear response with dose. The TL glow peak shows more stability and less fading in prepared phosphor which is suitable for TL dosimetry.

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Section: Resultsmentioning

confidence: 99%

“…1 (a). Below 550 • C, the diffract patterns The size of the Ca 0.98 Eu 0.02 ZrO 3 crystallite was calculated using the Debye Sherer formula [25]:…”

Section: Resultsmentioning

confidence: 99%

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Studies on the photoluminescence and thermoluminescence properties of CaZrO3:xEu3+ phosphor for dosimetric application

Fesharaki

Jalali

Karimi

et al. 2021

Preprint

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“…The Ca1-xZrO3:Eux (CZE) samples were studies in some previously published papers (Fukushima et al, 2020;Katyayan et al, 2017;S. Kumar et al, 2018;Shimokawa et al, 2015;Tiwari et al, 2015;H. Zhang et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Luminescence and structural properties of Ca1-xZrO3:Eux: An experimental and theoretical approach

Assis¹,

Oliveira²,

Gouveia³

et al. 2022

Eclet. Quim. J.

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The influence of Eu3+ cations in the host matrix of CaZrO3 was investigated by analyzing its luminescence and structural properties. The Ca1-xZrO3:Eux crystals (x = 0.01, 0.02, 0.04, and 0.08 mol%) were obtained by a simple sol-gel method followed by a soft thermal treatment without any surfactant. The structural characterization was performed at short-, medium- and long-distance to verify the effect of the dopant in the host matrix. To endorse the experimental results, first-principles calculations were performed by using the CRYSTAL program associated with the density functional theory. The luminescence profile of the sample was investigated by analyzing the excitation and emission spectrum monitoring the emission at 614 nm and excited at 394 nm, noting that the sample Eu-doped with 0.08 mol% has greater emission intensity. The color variations of the characteristic emissions of Ca1-xZrO3:Eux crystals were evaluated according to the Commission Internationale de L'�clairage, observing a red shift for all Eu-doped samples. A general luminescence scheme was proposed combining the density of state and the band structure calculations.

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“…In this study, we selected perovskite-type calcium zirconate (CaZrO 3 ) as a host material for the environmentally friendly yellow pigment, which is composed of only nontoxic elements. In addition, CaZrO 3 has a high melting point ( T m = 2365 °C) and sufficient chemical stability. , Hence, this compound is well-known as a mother for rare-earth-doped phosphors, such as CaZrO 3 :RE 3+ (RE 3+ = Sm 3+ , Eu 3+ , Gd 3+ , Tb 3+ , and Tm 3+ ). − When Eu 2+ is doped into the Ca 2+ site, the crystal field around the Eu 2+ ion should be strong because the ionic radius of Ca 2+ (0.112 nm for 8 coordination) is smaller than that of Eu 2+ (0.125 nm for 8 coordination) . As a result, the crystal field splitting of the 5d orbitals of Eu 2+ becomes large, and the transition energy of Eu 2+ from the 4f to 5d orbitals is expected to be small, corresponding to the wavelength of visible light.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Ca_1–xEu_xZrO₃ as Environmentally Friendly Inorganic Yellow Pigments

et al. 2021

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Eu 2+ -doped calcium zirconates, Ca 1−x Eu x ZrO 3 (0 ≤ x ≤ 1), were synthesized as novel environmentally friendly inorganic yellow pigments by the conventional solid-state reaction method. The crystal structure, morphology, optical properties, and color were characterized. The Eu 2+ -doped samples strongly absorbed blue light in the wavelength range of 435−480 nm, which was caused by the 4f−5d allowed transition of Eu 2+ . The color of the sample gradually became brilliant yellow with increasing the Eu 2+ content. Among the samples synthesized in this study, the brightest yellow color was obtained with the Ca 0.7 Eu 0.3 ZrO 3 (a* = +11.5 and b* = +70.7) sample. Compared with the commercially available praseodymium yellow pigment (a* = −3.28, b* = +70.3), the yellowness value (b*) of Ca 0.7 Eu 0.3 ZrO 3 was comparable and the redness value (a*) was higher. As a result, this pigment exhibited a reddish yellow color as compared with praseodymium yellow. In addition, this pigment was chemically stable. Therefore, the Ca 0.7 Eu 0.3 ZrO 3 pigment has the potential to become a novel environmentally friendly inorganic yellow pigment.

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Optical studies of Eu3+ doped CaZrO3 phosphor for display device applications

Cited by 20 publications

References 30 publications

Studies on the photoluminescence and thermoluminescence properties of CaZrO3:xEu3+ phosphor for dosimetric application

Studies on the photoluminescence and thermoluminescence properties of CaZrO3:xEu3+ phosphor for dosimetric application

Luminescence and structural properties of Ca1-xZrO3:Eux: An experimental and theoretical approach

Synthesis and Characterization of Ca_1–xEu_xZrO₃ as Environmentally Friendly Inorganic Yellow Pigments

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Optical studies of Eu3+ doped CaZrO3 phosphor for display device applications

Cited by 20 publications

References 30 publications

Studies on the photoluminescence and thermoluminescence properties of CaZrO3:xEu3+ phosphor for dosimetric application

Studies on the photoluminescence and thermoluminescence properties of CaZrO3:xEu3+ phosphor for dosimetric application

Luminescence and structural properties of Ca1-xZrO3:Eux: An experimental and theoretical approach

Synthesis and Characterization of Ca1–xEuxZrO3 as Environmentally Friendly Inorganic Yellow Pigments

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Synthesis and Characterization of Ca_1–xEu_xZrO₃ as Environmentally Friendly Inorganic Yellow Pigments