Luminescence and energy transfer properties of Eu3+ and Gd3+ in ZrO2

Villabona-Leal, E.G.; Dı́az-Torres, L.A.; Desirena, H.; Rodríguez-López, J.L.; Pérez, Elı́as; Meza, O.

doi:10.1016/j.jlumin.2013.10.002

Cited by 37 publications

(15 citation statements)

References 17 publications

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“…ZrO 2 exhibit two band gap transitions that are attributed by the presence of defects through generation of oxygen vacancies due to the replacement of Zr 4+ by Eu 3+ at ZrO 2 lattice The band gap value (Table ) determined from absorption spectra of EZTA exhibited good corroboration with the reported band gap of ZrO 2 (5.21 eV) , and a reducing trend in band gap values were witnessed with the simultaneous increment in Eu 3+ additions.…”

Section: Resultssupporting

confidence: 59%

“…Excitation spectrum exhibited typical Eu 3+ bands in 350–470 nm range that correspond to 4f ‐ 4f transitions from ground state 7 F 0 to higher energy states. Excitation peaks observed at 361, 381, 393, 414, and 464 nm corresponds to the 7 F 0 → 5 D 4 , 7 F 0 → 5 L 7 , 7 F 0 → 5 L 6 , 7 F 0 → 5 D 3 , and 7 F 0 → 5 D 2 of Eu 3+ transitions . The most intense excitation determined at 393 nm has been used as a source to record the emission of all EZTA compositions.…”

Section: Resultsmentioning

confidence: 99%

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Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Ponnilavan

Kannan

2018

J Biomed Mater Res

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The structural and optical features of zirconia toughened alumina (ZTA) due to the assorted range of Eu 3+ substitutions are demonstrated. The characterization studies affirm the pivotal role of Eu 3+ on the improved structural stability of ZTA and associated tetragonal zirconia (t-ZrO 2 ) ! cubic zirconia (c-ZrO 2 ) transformation. Eu 3+ prefers accommodation at the lattice sites of ZrO 2 and their gradual accumulation induces t-! c-ZrO 2 transition. Beyond the substitution limit, Eu 3+ reacts with Al 2 O 3 to form EuAlO 3 . Optical studies validate typical Eu 3+ emissions, and further, the emission spectrum also predicts the symmetry of Eu 3+ coordination at the ZrO 2 lattice. Uniform distribution of ZrO 2 and Al 2 O 3 grains throughout the microstructures are evident from the morphological analysis. Further, the influence of Eu 3+ on the enhanced mechanical stability of ZTA is ensured from indentation technique.

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Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Ponnilavan

Kannan

2018

J Biomed Mater Res

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“…Such a coexistence of characteristic emission peaks corresponding to Dy 3+ and Sm 3+ ion is only possible if there is energy transfer between energy levels of Dy 3+ and Sm 3+ active ions. Villabona‐Leal et al report the enhancement in luminescence intensity due to an energy transfer process occurring among Eu 3+ and Gd 3+ active ions codoped in a similar system like ZrO 2 …”

Section: Resultsmentioning

confidence: 99%

Latent Fingerprint Imaging Using Dy and Sm Codoped HfO₂ Nanophosphors: Structure and Luminescence Properties

Sandeep

Bahadur

Rath

2019

Part & Part Syst Charact

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The development of latent fingerprints (LFPs) detected at the site of crime is considered as an imperative physical evidence in forensic investigations. Herein, a rapid and cost‐effective approach using nonhazardous Dy and Sm codoped HfO2 nanophosphors is demonstrated to be utilized for LFP imaging. Sol–gel method can produce Dy and Sm codoped HfO2 of monoclinic phase with crystallite size ranging from ≈10 to 25 nm. While selected area electron diffraction and lattice spacing calculated from high‐resolution transmission electron microscopy confirm monoclinic phase, Le‐Bail profile refinement of X‐ray diffraction (XRD) patterns demonstrate an exponential increase in lattice volume with incorporating various concentrations of Dy and Sm in HfO2 lattice. Exciting Dy and Sm codoped HfO2 with 393 nm photoluminescence spectra show emissions in blue, yellow, and near red regions emerging primarily due to energy transfer from Dy3+ to Sm3+ through multipolar interaction suggested by time resolved decay spectra. Combining excitation and emission spectra, an energy band diagram is proposed. Owing to excellent emissions, Dy and Sm codoped HfO2 are explored for LFP imaging with good selectivity and resolution over multivariate surfaces like float glass and aluminum foil. The third‐level details like enclosure and termination–bifurcation are extracted due to nanosized nature of particles.

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“…Furthermore, the intensity of the Tm 3+ absorption peaks changed with the Tm 2 O 3 contents, but their positions and shapes were unchanged, as expected from the XRD data which indicate that the samples all have the same structure. The intense absorption peak at ˜250 nm arises from a charge transfer transition equivalent to the peak at 240 nm in pure ZrO 2 , [28] and the optical bandgap, E g , for the matrix can be calculated from this transition using the Tauc equation [29] (𝛼h𝜈…”

Section: Absorption Spectramentioning

confidence: 99%

Upconversion Emission in Tm/Er/Yb Co‐Doped Yttria Stabilized Zirconia Single Crystals

Pan

et al. 2022

Crystal Research and Technology

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Blue, green, and red emissions through upconversion and energy transfer processes are investigated as a function of the Tm3+ concentration in Tm/Er/Yb triply doped yttria stabilized zirconia (YSZ) crystals upon excitation at 980 nm. YSZ doped with 0.075–0.250 mol% Tm2O3, 1.50 mol% Er2O3, and 2.00 mol% Yb2O3 are prepared by the optical floating zone method, and confirmed to be in the cubic phase by X‐ray diffraction. The blue emission corresponds to the Tm3+ 1G4→3H6 transition, and is produced through a three‐photon process, whereas the green and red light are emitted through two‐photon processes from the Er3+ 2H11/2→4I15/2 and 4S3/2→4I15/2 transitions for green and the Er3+ 4F9/2→4I15/2 transition for red. However, interactions between the different lanthanide ions is a factor in determining the overall color of these triply doped crystals, and this is not simply a summation of the results from the singly doped systems, so this mechanism of energy transfer is discussed in detail. The CIE color chromaticity coordinates for the present samples under excitation at 980 nm approach (0.39, 0.55), which is in the yellow‐green region.

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Luminescence and energy transfer properties of Eu3+ and Gd3+ in ZrO2

Cited by 37 publications

References 17 publications

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Latent Fingerprint Imaging Using Dy and Sm Codoped HfO₂ Nanophosphors: Structure and Luminescence Properties

Upconversion Emission in Tm/Er/Yb Co‐Doped Yttria Stabilized Zirconia Single Crystals

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Luminescence and energy transfer properties of Eu3+ and Gd3+ in ZrO2

Cited by 37 publications

References 17 publications

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Latent Fingerprint Imaging Using Dy and Sm Codoped HfO2 Nanophosphors: Structure and Luminescence Properties

Upconversion Emission in Tm/Er/Yb Co‐Doped Yttria Stabilized Zirconia Single Crystals

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Product

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Latent Fingerprint Imaging Using Dy and Sm Codoped HfO₂ Nanophosphors: Structure and Luminescence Properties