Luminescence spectroscopy of Ln-doped Bi-containing phosphates and molybdates

Hizhnyi, Yu.; Chornii, V.; Nedilko, S.; Slobodyanik, M.S.; Тerebilenko, К.; Boyko, Volodymyr; Gomenyuk, O.; Sheludko, V.

doi:10.1016/j.radmeas.2016.01.014

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…Molybdates and tungstates find a wide range of practical applications due to their ability to adopt different crystallographic structures, whose physical properties can be further modified by a chemical composition [1,2]. In particular, these materials are used as scintillators, down-conversion phosphors, white light-emitting diodes, laser host materials, catalysts, sensors and pigments [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4

Jonane

Cintiņš

Kalinko

et al. 2018

Low Temperature Physics

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Thermochromic phase transition was studied in CuMoO4 using the Cu and Mo K-edge X-ray absorption spectroscopy in the temperature range of 10-300 K. The hysteretic behavior has been evidenced from the temperature dependence of the pre-edge shoulder intensity at the Mo K-edge, indicating that the transition from brownish-red γ-CuMoO4 to green α-CuMoO4 occurs in the temperature range of 230-280 K upon heating, whereas the α-to-γ transition occurs between 200 and 120 K upon cooling. Such behavior of the pre-edge shoulder at the Mo K-edge correlates with the change of molybdenum coordination between distorted tetrahedral in α-CuMoO4 and distorted octahedral in γ-CuMoO4. This result has been supported by ab initio full-multiple-scattering X-ray absorption near edge structure (XANES) calculations.

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Section: Introductionmentioning

confidence: 99%

X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4

Jonane

Cintiņš

Kalinko

et al. 2018

Low Temperature Physics

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“…Therefore, we concluded that additive peaks are caused by oxide components of composites. It was confirmed by those peaks positions comparison with XRD pattern of the NaNO 2 , CsNO 3 , La 1−x Sm x VO 4 , La 1−x Eu x VO 4 , and K 2 Eu(PO 4 )(MoO 4 ) compounds [37,48,[49][50][51][52][53]. Detailed description and analysis of the similar composites XRD patterns can be found in [44].…”

Section: Xrd Analysismentioning

confidence: 64%

“…Used oxides could be made by three various procedures: solid state reaction, co-precipitation and sol-gel. We have found recently that luminescence intensity for each oxide depends on the RE ions concentration and on the way of their synthesis [48,49]. In fact, we have found that for LaVO 4 doped with RE the average size was 1-2 µm for solid-state way of the synthesis, 0.2-0.5 µm -for the co-precipitation, and 0.1-0.2 µm for the sol-gel way.…”

Section: Methodsmentioning

confidence: 89%

“…We denote the composites of such type here as W-NaNO 2 and W-CsNO 3 . The details both of the oxides synthesis and the samples preparation can be found in [36,37,44,48,49].…”

Section: Methodsmentioning

confidence: 99%

“…Those were scanning electron microscopy (SEM), chemical elements analysis, X-ray diffractometry (XRD), luminescence spectroscopy and dielectric characteristics measurements. Equipment and any other details of experimental study can be found also in [36,37,44,48,49].…”

Section: Methodsmentioning

confidence: 99%

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Polymer-Oxide Composites: Toward New Optical Materials

Nedilko

2018

Acta Phys. Pol. A

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Brief summary concerning properties of the polymer matrix incorporated with inorganic, e.g. oxide particles, micro/nanocomposites and opportunity to use these composites as optical materials for modern optics and optoelectronic devices is presented in the work. Structure and morphology of the several sets of the new polymer micro/nanocomposites based on the microcrystalline cellulose incorporated with micro/nanoparticle of various oxides (NaNO2, La1−xSmxVO4, La1−xEuxVO4 and K2Eu(PO4)(MoO4)), were prepared by "dry" and "wet" cool pressing procedure. Morphology of these composites was described as ensemble of cellulose plates and located gains of the oxide particles. Temperature dependences of complex dielectric permittivity and luminescence properties of the composites were studied. Temperature and electromagnetic field frequency dependences of the dielectric permittivity revealed influence of oxide particles on the characteristics of the microcrystalline cellulose. Both wide band (matrix emission) and narrow lines (RE ions emission) of visible luminescence (350-750 nm range) of the composites is excited in the range 250-550 nm. The luminescence characteristics displayed effect of cellulose on the electronic system of the Sm 3+ and Eu 3+ ions and effect of oxide particles on the cellulose matrix was shown, too. Spectral characteristics and high intensity of luminescence showed perspectives of studied composites to be used as light converters in LED and elsewhere as optics luminescent materials.

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