Structure and luminescence spectra of lutetium and yttrium borates synthesized from ammonium nitrate melt

Классен, Н. В.; Шмурак, С. З.; Шмытько, И. М.; Струкова, Г. К.; Derenzo, Stephen E.; Weber, Marvin J.

doi:10.1016/j.nima.2004.07.254

Cited by 22 publications

(7 citation statements)

References 2 publications

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“…As a member of rare-earth-activated LnBO 3 , Eu 3+ -doped LuBO 3 not only has been considered as an promising candidate for the aforementioned applications but also appears to be a good scintillator because of its high density. − However, in the past few years, there appeared only a few papers in the literature ,,− concerning the preparation and luminescence properties of LuBO 3 :Eu 3+ . Various cation sites are observed in the vaterite type LuBO 3 :Eu 3+ by using luminescence probing. , It is found in rare-earth-doped orthoborates that the luminescence properties are related to the size, shape, and crystal types, which can be governed by synthetic routes and parameters. ,− So the present tendency of development of such materials is not oriented especially toward new phases but mostly toward a better knowledge and a better control of microstructures of existing materials.…”

Section: Introductionmentioning

confidence: 99%

“…Various cation sites are observed in the vaterite type LuBO 3 :Eu 3+ by using luminescence probing. , It is found in rare-earth-doped orthoborates that the luminescence properties are related to the size, shape, and crystal types, which can be governed by synthetic routes and parameters. ,− So the present tendency of development of such materials is not oriented especially toward new phases but mostly toward a better knowledge and a better control of microstructures of existing materials. Nevertheless, the previously methods derived LuBO 3 :Eu 3+ mainly include solid-state reaction method, , sol−gel technology, , and the ammonium nitrate melt method, which need high temperature or iterative grind process, leading to a bad morphology. Therefore, it is highly desired to synthesize LuBO 3 :Eu 3+ phosphor with homogeneous and regular morphology by a controllable approach toward durable structures.…”

Section: Introductionmentioning

confidence: 99%

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Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO₃:Eu³⁺ Nano/Microcrystals Synthesized by Hydrothermal Approach

Zhang

et al. 2009

Chem. Mater.

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The calcite and vaterite type LuBO 3 :Eu 3+ nano/microcrystals with various morphologies were synthesized by the hydrothermal (HT) approach through controlling the pH values of the precursor solutions. The calcite type LuBO 3 :Eu 3+ shows the dominant magnetic dipole 5 D 0 -7 F 1 emission due to S 6 inversion symmetry of Lu. It also shows a symmetrical O-Eu charge transfer (CT) excitation band, which, however, is asymmetrical and broad in the material prepared by the solid-state (SS) reaction method. The effect of the residual OHgroups introduced in HT synthesis is discussed on O-Lu exciton annihilation and local environment distortion. Two different Eu 3+ centers, one of which is with inversion symmetry, are observed in vaterite type LuBO 3 :Eu 3+ . The HT sample with nanostructures, such as vaterite type flowerlike LuBO 3 :Eu 3+ , demonstrates a red shift of the CT band and appearance of a long excitation tail at the long wavelength side of the CT band. XRD, selective excitation and fluorescence decay measurements indicate that the red shift is induced by an increase of crystal lattice parameters, and the excitation tail is responsible to the Eu 3+ ions located at lower symmetric sites. These sites are attributed to the positions at or close to the surface of the nanostructures in the sample. As the lower symmetric sites are selectively excited, the red emission of 5 D 0 -7 F 2 of Eu 3+ enhanced twice relatively to the orange emission of 5 D 0 -7 F 1 , exhibiting superior color chromaticity in red for display application. The luminescence properties of interior Eu 3+ and outside Eu 3+ are studied and discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO₃:Eu³⁺ Nano/Microcrystals Synthesized by Hydrothermal Approach

Zhang

et al. 2009

Chem. Mater.

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“…Следует отметить, что полосы ∼ 390 и ∼ 420 nm, соответствующие свечению ионов Се 3+ , наблюдаются в спектрах люминесценции ватеритной модификации легированных церием образцов ортобората лютеция, полученных также методами твердофазного синтеза [1,[21][22][23][24].…”

Section: результаты ик-спектроскопииunclassified

Перенос энергии от Ce-=SUP=-3+-=/SUP=- к Tb-=SUP=-3+-=/SUP=- в ортоборатах иттрия и гадолиния, полученных гидротермальным синтезом

Шмурак¹,

Кедров²,

Киселев³

et al. 2018

Журнал Технической Физики

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Проведены исследования структуры, ИК-спектров поглощения, спектральных характеристик фотолюминесценции и морфологии полученных гидротермальным синтезом при 200 • C ортоборатов гадолиния и иттрия, активированных церием и тербием, а также твердых растворов ортоборатов на основе иттрия, гадолиния и лютеция состава RECe 0.01 Tb 0.1 BO 3 (RE = Lu 0.5 Gd 0.39 ; Lu 0.5 Y 0.39 ; Y 0.5 Gd 0.39). Рентгенодифракционный спектр ортобората иттрия Y 1−x−y Cex Tby BO 3 описывается гексагональной решеткой с пространственной группой P6 3 /m, которая после отжига при 970 • C переходит в моноклинную решетку с пространственной группой C2/c. Высокотемпературный отжиг полученных в настоящей работе ортоборатов приводит к многократному, более чем на два порядка, увеличению интенсивности свечения ионов Tb 3+ при возбуждении образцов в полосе поглощения ионов церия. Этот эффект является следствием значительного увеличения концентрации ионов Се 3+ в ортоборатах при высоких температурах. Показано, что свечение ионов тербия происходит в результате переноса энергии от ионов Се 3+ к Tb 3+ , который осуществляется по механизму кулоновского диполь-дипольного взаимодействия между церием и тербием с высокой эффективностью (∼ 85%).

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“…В СЛ ватеритных модификаций REBO 3 (Се), где RE -Lu, Tb, Gd, Y также наблюдаются широкие полосы (380−470 nm) с λ max ∼ 395 и ∼ 425 nm. Свечение церия в кальцитной и ватеритной модификациях боратов редкоземельных ионов обусловлено разрешенными переходами 5d → 4 f в Се 3+ центрах [4][5][6][7].…”

Section: Introductionunclassified

Спектральные характеристики и перенос энергии Ce-=SUP=-3+-=/SUP=-->Tb-=SUP=-3+-=/SUP=-->Eu-=SUP=-3+-=/SUP=- в соединении LuBO-=SUB=-3-=/SUB=-(Ce, Tb, Eu)

Шмурак¹,

Кедров²,

Киселев³

et al. 2022

Физика Твердого Тела

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The structure, IR, luminescence, and luminescence excitation spectra of Ce3+, Tb3+, and Eu3+ ions in Lu1−2xCexEuхBO3 and Lu0.91−2xCexTb0.09EuхBO3 solid solutions were studied. The minimum "threshold" distance between Ce3+ and Eu3+ ions was estimated, at which there is no charge transfer between these ions, leading to the quenching of Ce3+ and Eu3+ luminescence. It is shown that in Lu0.91−2xCexTb0.09EuхBO3 compounds, the range of Ce and Eu concentrations of 0.2 – 0.25 at. % is optimal for obtaining the maximum luminous intensity of this compound.

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Structure and luminescence spectra of lutetium and yttrium borates synthesized from ammonium nitrate melt

Cited by 22 publications

References 2 publications

Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO₃:Eu³⁺ Nano/Microcrystals Synthesized by Hydrothermal Approach

Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO₃:Eu³⁺ Nano/Microcrystals Synthesized by Hydrothermal Approach

Перенос энергии от Ce-=SUP=-3+-=/SUP=- к Tb-=SUP=-3+-=/SUP=- в ортоборатах иттрия и гадолиния, полученных гидротермальным синтезом

Спектральные характеристики и перенос энергии Ce-=SUP=-3+-=/SUP=-->Tb-=SUP=-3+-=/SUP=-->Eu-=SUP=-3+-=/SUP=- в соединении LuBO-=SUB=-3-=/SUB=-(Ce, Tb, Eu)

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Structure and luminescence spectra of lutetium and yttrium borates synthesized from ammonium nitrate melt

Cited by 22 publications

References 2 publications

Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO3:Eu3+ Nano/Microcrystals Synthesized by Hydrothermal Approach

Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO3:Eu3+ Nano/Microcrystals Synthesized by Hydrothermal Approach

Перенос энергии от Ce-=SUP=-3+-=/SUP=- к Tb-=SUP=-3+-=/SUP=- в ортоборатах иттрия и гадолиния, полученных гидротермальным синтезом

Спектральные характеристики и перенос энергии Ce-=SUP=-3+-=/SUP=--&gt;Tb-=SUP=-3+-=/SUP=--&gt;Eu-=SUP=-3+-=/SUP=- в соединении LuBO-=SUB=-3-=/SUB=-(Ce, Tb, Eu)

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Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO₃:Eu³⁺ Nano/Microcrystals Synthesized by Hydrothermal Approach

Luminescent Properties in Relation to Controllable Phase and Morphology of LuBO₃:Eu³⁺ Nano/Microcrystals Synthesized by Hydrothermal Approach

Спектральные характеристики и перенос энергии Ce-=SUP=-3+-=/SUP=-->Tb-=SUP=-3+-=/SUP=-->Eu-=SUP=-3+-=/SUP=- в соединении LuBO-=SUB=-3-=/SUB=-(Ce, Tb, Eu)