Photoluminescence and Thermoluminescence of the Oxygen-Deficient YAG, YAP, and YAM Phosphors

Zhydachevskyy, Yaroslav; Kamińska, Izabela; Głowacki, M.; Kilian, A.; Ubizskii, S.; Bilski, P.; Berkowski, M.; Fronc, K.; Elbaum, Danek; Suchocki, A.

doi:10.12693/aphyspola.133.977

Cited by 13 publications

(6 citation statements)

References 15 publications

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“…The PL spectrum of the sample calcined at 400 °C is dominated by the strong peak at 710 nm, which is attributed to 5 D 0 → 7 F 4 electric-dipole transition 5 D 0 → 7 F 2 transition lines visible at 610 and 630 nm, and 5 D 0 → 7 F 3 transition lines at 650 and 655 nm are weaker. It is worth mentioning that all the above-listed peaks have been observed for Eu 3+ in YAG crystal [30]. The spectra also show some additional features which are not observed in YAG doped with Eu 3+ .…”

Section: Photoluminescence and Plementioning

confidence: 61%

Optical and structural properties of europium doped Y–Al–O compounds grown by microwave driven hydrothermal technique

Cichocka¹,

Kobyakov²,

Kaszewski³

et al. 2021

Nanotechnology

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Perovskites, garnets, monoclinic forms, and lately also oxyhydroxides doped with rare-earth ions have been drawn large attention due to their beneficial optical and photovoltaic properties. In this work, we have shown that several forms of crystals from Y–Al–O family can be synthesized using microwave driven hydrothermal technique using different pH and post-growth annealing at different temperatures. The structural and optical properties of these crystals were investigated as a function of hydrothermal crystallization conditions. For this purpose, x-ray diffraction, scanning electron microscopy, energy-dispersive x-ray spectroscopy, transmission electron microscopy, photoluminescence, and photoluminescence excitation studies were performed. All the structures have been doped with Eu3+ ions which are known as a local symmetry sensor because various symmetries generate different crystal fields and thus affect their luminescence spectra. The optical properties of the obtained nanoparticles in correlation with their structure and chemical composition are discussed.

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Section: Photoluminescence and Plementioning

confidence: 61%

Optical and structural properties of europium doped Y–Al–O compounds grown by microwave driven hydrothermal technique

Cichocka¹,

Kobyakov²,

Kaszewski³

et al. 2021

Nanotechnology

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“…The character of the traps associated with the graphene addition may be twofold. The graphene as a reduction agent may increase the oxygen-deficiency defects (oxygen vacancies) in the structure [ 36 ]. For the same reason, it can cause a change in the oxidation state of Ce and Dy ions, leading to the local charge mismatches and as a result the appearance of cation vacancies.…”

Section: Resultsmentioning

confidence: 99%

Effect of Graphene Addition on the Thermal and Persistent Luminescence Properties of Gd2.994Ce0.006Ga3Al2O12 and Gd2.964Ce0.006Dy0.03Ga3Al2O12 Ceramics

et al. 2022

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The gadolinium, gallium, aluminum garnet doped with cerium and co-doped with dysprosium ions were prepared using sol gel method. The SEM images show that after synthesis, the grains are below 100 nm. The powders were ultrasonically mixed with graphene nanoflakes and ceramics were prepared using the high pressure low temperature sintering technique. A series of the ceramics was prepared using different graphene content. The structure of the samples was examined using X-ray diffraction (XRD), scanning electron microscope (SEM) and Raman techniques. The spectroscopic properties were checked using conventional and persistent luminescence spectra measurements. The thermoluminescence glow curves and fading time of persistent luminescence measurements were performed to check how the graphene presence affects the electron traps number and depth. It was found that the addition of graphene improved the thermal conductivity of co-doped samples. This resulted in faster release of deeper traps and an increase in fading of persistent luminescence. The possibility of releasing energy from deep traps without additional stimulation may allow the use in different applications, the matrices and luminescent ions, which so far did not show persistent luminescence at room temperature.

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“…TL response is attributed to the oxygen vacancy related to F and F+ color centers and YAl 3+ antisite defects [7]. Further, the undoped single crystal irradiated with 100 MeV Si 7+ ions exhibit two completely overlapped glow curves at 232 and 328 C which are attributed to the oxygen vacancies and other point defects, such as YAl 3+ and AlY 3+ antisite defects [18].…”

Section: Introductionmentioning

confidence: 93%

“…The RE or TM dopants in YAP introduce several energy levels within the forbidden bandgap and these energy levels manifest as a characteristic optical emission or absorption under suitable external stimulation which is being effectively used as solid state lasers [3]. The optical properties of YAP crystals doped with various impurities such as Ce, Mn, Ho, Tm, Er, Pr, Cu, Dy, Sm, Yb, Cr, Eu and Nd are extensively studied [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. These doped YAP crystals also have an excellent emission characteristics in UV/visible range when irradiated with ionizing radiation and hence, it is being used in radiation dose measurements as an active element (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Although the pure YAP crystals are not expected to show any response because of the non-availability of trap centers except the radiation induced point defects to store the energy from irradiation, the practical crystals always have intrinsic defects that can act as trap centers for TL response. Zhydachevskyy et al [7] reported that the undoped YAP also exhibits two glow peaks with maximum intensity at about 225 C along with minor peak at ~ 140 C upon βirradiation.…”

Section: Introductionmentioning

confidence: 99%

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Structural and optical properties of beta irradiated YAlO3 single crystals

et al. 2020

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Photoluminescence and Thermoluminescence of the Oxygen-Deficient YAG, YAP, and YAM Phosphors

Cited by 13 publications

References 15 publications

Optical and structural properties of europium doped Y–Al–O compounds grown by microwave driven hydrothermal technique

Optical and structural properties of europium doped Y–Al–O compounds grown by microwave driven hydrothermal technique

Effect of Graphene Addition on the Thermal and Persistent Luminescence Properties of Gd2.994Ce0.006Ga3Al2O12 and Gd2.964Ce0.006Dy0.03Ga3Al2O12 Ceramics

Structural and optical properties of beta irradiated YAlO3 single crystals

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