Structural and photoluminescent properties of the MgGa2O4:Co2+ ceramic compound revisited after two decades

Pedro, S.S.; Silva, M. A. F. M. Da; López, A.; Sosman, L.P.

doi:10.1007/s40145-015-0160-2

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…In its opaque state, it has various applications, including electronics, energy production, and spintronics [1,2], but the most interesting applications are those that exploit the fact that transparency (in the single crystal state) can be coupled with n-type electronic conductivity [1,3]. For instance, photodetectors, gas sensors, transparent electrodes, solid-state phosphors, waveguides, LEDs, or lasing ion hosts (operation at < 100 K) may be derived from this material [3][4][5][6][7]. Moreover, owing primarily to the partially inverted character of its cubic lattice, MgGa 2 O 4 is a useful host for transition metal (TM) cation dopant spectroscopy (see Section 2).…”

Section: Introduction mentioning

confidence: 99%

Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics

Zhang

Goldstein²,

2022

J Adv Ceram

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In this study we fabricated, for the first time, magnesium gallate (MgGa2O4, a partially inverted spinel) transparent ceramics, both undoped and doped with 1 at% Ni. The specimens were derived from in-house prepared powder, with a crystallite size of ∼10 nm (by wet chemistry) and densified by pulsed electric current sintering (PECS; peak temperature 950 °C for 90 min). Densification levels of 99.84% and 99.52% of theoretical density were attained for doped and undoped materials, respectively. Doping with Ni was seen to marginally improve the densification level. Quite transparent specimens were produced: the best showing transmission of ∼89% of the theoretical level (thickness t = 0.85 mm). The absorption spectra revealed that the dopant was accumulated as Ni2+ in the octahedral sites of the lattice, as occurs in single-crystal specimens. After excitation at 980 nm, the doped disks exhibited a wide fluorescence band centered at 1264 nm.

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Section: Introduction mentioning

confidence: 99%

Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics

Zhang

Goldstein²,

2022

J Adv Ceram

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“…For example, we investigated the compound MgGa 2 O 4 :Co 2+ obtained through the solid-state method for the first time in 1992. More than two decades later, it was observed that the structural and photoluminescent properties of the MgGa 2 O 4 :Co 2+ sample remained unchanged 14 .…”

Section: Introductionmentioning

confidence: 99%

Polycrystalline Compound of Co2+-doped Zn2SnO4: Structural and Photoluminescent Properties

et al. 2022

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In this work, Zn 2 SnO 4 :Co 2+ (0.1%) was obtained through a solid-state reaction at high temperature using ZnO, SnO 2 , and CoCO 3 . The sample was investigated using X-ray diffraction, X-ray fluorescence, scanning electron microscopy, and photoluminescence spectroscopy. Rietveld refinements of the X-ray diffraction data showed two crystalline phases, Zn 2 SnO 4 and SnO 2 , with proportions of 97.24% and 2.76%, respectively, while Zn and Sn atoms were observed by X-ray fluorescence. Scanning electron microscopy images showed the polycrystalline nature of the material. Photoluminescence spectroscopy showed two emission bands in the red and near-infrared regions, with the broader and more intense band having a barycenter at 694 nm. The intensity of the emission changed with the excitation wavelength, whereas the barycenter remained unchanged. The intensity, shape, and position of the bands, as well as the calculated crystal field parameters, indicate the insertion of Co 2+ ions in the tetrahedral sites of the Zn 2 SnO 4 material.

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Synthesis and microstructure of Co/Ni: MgGa2O4 nanoparticles

Liu

Duan

et al. 2017

J Nanopart Res

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Structural and photoluminescent properties of the MgGa2O4:Co2+ ceramic compound revisited after two decades

Cited by 6 publications

References 16 publications

Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics

Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics

Polycrystalline Compound of Co2+-doped Zn2SnO4: Structural and Photoluminescent Properties

Synthesis and microstructure of Co/Ni: MgGa2O4 nanoparticles

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