Spectral downshifting in MBO3:Nd3+ (M=Y, La) phosphor

Omanwar, S. K.; Sawala, N. S.

doi:10.1007/s00339-017-1268-8

Cited by 14 publications

(11 citation statements)

References 19 publications

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“…При дальнейшем увеличении концентрации Lu 3+ (при 0.8 < x < 0.95) количество мелких микрокристаллов (0.5−1 µm) уменьшается, а более крупных (∼ 2−4 µm) -увеличивается (рис. [23,24]. Соединения Pr 0.99−x Lu x Eu 0.01 BO 3 (0.95 ≤ x ≤ 0.99), имеющие структуру кальцита, состоят из микрокристаллов, размеры которых при x = 0.95 и 0.99 равны ∼ 2−4 и ∼ 3−10 µm соответственно (рис.…”

Section: морфология образцовunclassified

“…P2 1 /m), в которую LaBO 3 переходит при температуре 1488 • С [6,17]. Ионы La 3+ в структуре арагонита окружены девятью ионами кислорода, а ионы бора имеют тригональную координацию по кислороду [18][19][20][21][22][23][24][25]. Следует отметить, что в структуре кальцита, например в LuBO 3 , ионы Lu 3+ окружены шестью ионами кислорода, а атомы бора имеют такую же, как в арагоните, тригональную координацию по кислороду -(BO 3 ) 3− [26].…”

Section: Introductionunclassified

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Структурные и спектральные характеристики ортоборатов Pr-=SUB=-1-x-=/SUB=-Lu-=SUB=-x-=/SUB=-BO-=SUB=-3-=/SUB=-

Шмурак¹,

Кедров²,

Киселев³

et al. 2022

Физика Твердого Тела

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The structure, IR absorption and luminescence spectra of Pr0.99xLuxEu0.01BO3 orthoborates synthesized at 970°C were studied at 0 ≤ x ≤ 0.99. An increase in the concentration of lutetium leads to a sequential change of the structural state of the orthoborates. At first, the orthoborates are single-phase and have an aragonite structure (0 ≤ x ≤ 0.1). Then, they become two-phase and contain the aragonite and vaterite phases (0.1 < x < 0.6). With a further increase in х (0.6 < x ≤ 0.8), the compounds are single-phase with a vaterite structure, then they contain the vaterite and calcite phases (0.8 < x ≤ 0.95), and, finally, they become single-phase with a calcite structure (0.95 < x ≤ 0.99). An unambiguous correspondence between the structural modification and IR spectra of these compounds was established. It is shown that the emission of Eu3 + ions is observed in samples where the concentration of europium exceeds that of praseodymium.

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Section: морфология образцовunclassified

Section: Introductionunclassified

Структурные и спектральные характеристики ортоборатов Pr-=SUB=-1-x-=/SUB=-Lu-=SUB=-x-=/SUB=-BO-=SUB=-3-=/SUB=-

Шмурак¹,

Кедров²,

Киселев³

et al. 2022

Физика Твердого Тела

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“…4, c). It should be noted that the Lu 1−x RE x BO 3 compounds (RE = Eu, Gd, Tb), obtained by the same method and having a vaterite structure, consist of microcrystals sized (∼ 1−2 µm) [23,24]. The Pr 0.99−x Lu x Eu 0.01 BO 3 (0.95 ≤ x ≤ 0.99) compounds with a calcite structure consist of microcrystals whose sizes with x = 0.95 and 0.99 are equal to ∼ 2−4 and ∼ 3−10 µm respectively (Fig.…”

Section: Sample Morphologymentioning

confidence: 99%

“…The LaBO 3 compound has two phase states: the low-temperature orthorhombic aragonite phase (space group Pnma) and the high-temperature monoclinic phase (space group P2 1 /m), to which LaBO 3 changes over at 1488 • C [6,17]. La 3+ ions in the aragonite structure are surrounded by nine oxygen ions, while boron ions have a trigonal coordination by oxygen [18][19][20][21][22][23][24][25]. It should be noted that Lu 3+ ions in the calcite structure, e.g.…”

Section: Introductionmentioning

confidence: 99%

Structural and spectral characteristics of Pr-=SUB=-1-x-=/SUB=-Lu-=SUB=-x-=/SUB=-BO-=SUB=-3-=/SUB=- orthoborates

Шмурак

Кедров

Kiselev

et al. 2022

Physics of the Solid State

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The structure, IR absorption and luminescence spectra of Pr0.99-xLuxEu0.01BO3 orthoborates synthesized at 970oC were studied at 0≤ x≤0.99. An increase in the concentration of lutetium leads to a sequential change of the structural state of the orthoborates. At first, the orthoborates are single-phase and have an aragonite structure (0≤ x≤0.1). Then, they become two-phase and contain the aragonite and vaterite phases (0.1<x<0.6). With a further increase in x (0.6<x≤0.8), the compounds are single-phase with a vaterite structure, then they contain the vaterite and calcite phases (0.8<x≤0.95), and, finally, they become single-phase with a calcite structure (0.95<x≤0.99). An unambiguous correspondence between the structural modification and IR spectra of these compounds was established. It is shown that the emission of Eu3+ ions is observed in samples where the concentration of europium exceeds that of praseodymium. Keywords: rare earth orthoborates, X-ray diffraction analysis, crystal structure, IR spectroscopy, luminescence spectra.

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“…Следует отметить, что ионы La 3+ в структуре арагонита окружены девятью ионами кислорода, а ионы бора имеют тригональную координацию по кислороду [18][19][20][21]. Ионы Lu 3+ в структуре кальцита, например в LuBO 3 , окружены шестью ионами кислорода, а атомы бора имеют такую же, как в арагоните, тригональную координацию по кислороду -(BO 3 ) 3− [22].…”

Section: Introductionunclassified

Эволюция структурных и спектральных характеристик ортоборатов Lu-=SUB=-0.99-x-=/SUB=-Sm-=SUB=-x-=/SUB=-Eu-=SUB=-0.01-=/SUB=-BO-=SUB=-3-=/SUB=-

Шмурак¹,

Кедров²,

Киселев³

et al. 2023

Физика Твердого Тела

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The structure, IR absorption and luminescence spectra, and morphology of Lu0.99xSmxEu0.01BO3 (0 ≤ x ≤ 0.99) orthoborates synthesized at 970°С were studied. With an increase in the Sm3+ concentration, a successive change of five structural states is observed: calcite (0 ≤ x ≤ 0.1) → calcite + vaterite (0.1 < x < 0.3) → vaterite (0.3 ≤ x ≤ 0.95) → vaterite + a triclinic phase (0.95 < x ≤ 0.98) → a triclinic phase (0.98 < x ≤ 1). A wide range of Sm3+ concentrations at which the vaterite phase (0.3 ≤ x ≤ 0.95) exists and a very narrow region of triclinic phase formation (0.98 < x ≤ 1) are important distinctive features of this system. Correspondence between the structure and spectral characteristics of these compounds was established. It is shown that the vaterite phase appears in the bulk of the microcrystals of the samples that have a calcite structure.

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Spectral downshifting in MBO3:Nd3+ (M=Y, La) phosphor

Cited by 14 publications

References 19 publications

Структурные и спектральные характеристики ортоборатов Pr-=SUB=-1-x-=/SUB=-Lu-=SUB=-x-=/SUB=-BO-=SUB=-3-=/SUB=-

Структурные и спектральные характеристики ортоборатов Pr-=SUB=-1-x-=/SUB=-Lu-=SUB=-x-=/SUB=-BO-=SUB=-3-=/SUB=-

Structural and spectral characteristics of Pr-=SUB=-1-x-=/SUB=-Lu-=SUB=-x-=/SUB=-BO-=SUB=-3-=/SUB=- orthoborates

Эволюция структурных и спектральных характеристик ортоборатов Lu-=SUB=-0.99-x-=/SUB=-Sm-=SUB=-x-=/SUB=-Eu-=SUB=-0.01-=/SUB=-BO-=SUB=-3-=/SUB=-

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