Evidence of luminescence modification with structure of zirconia phases

Lokesha, H.S.; Nagabhushana, K.R.; Singh, Fouran

doi:10.1016/j.jlumin.2017.06.042

Cited by 18 publications

(26 citation statements)

References 34 publications

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“…The XRD results of the ZrO 2 sample annealed at ≤500 °C show a tetragonal phase and it transforms into monoclinic when ZrO 2 was annealed at a higher temperature, that is, ≥1000 ο C. Meanwhile, the PL emission peak position changed with the crystalline phase of ZrO 2 . Typically, the synthesized ZrO 2 sample exhibits 5–10% of the tetragonal phase along with the monoclinic phase. − According to the literature, a prominent PL peak appears in the range 390–425 nm for a pure tetragonal structure , with a lifetime decay smaller than 10 ns. ,, A PL peak is reported between 475 and 500 nm for monoclinic ZrO 2 ,− with a corresponding lifetime decay of up to a few μs (<20 μs). , As far as monoclinic ZrO 2 is concerned, the origin of the prominent emission band (expected in the range 475–500 nm) is still a matter of debate. Several reports attribute this band to the inherent presence of impurity titanium ions (Ti 3+ ) ,,, and this hypothesis is supported by density functional theory (DFT) calculations .…”

Section: Introductionmentioning

confidence: 97%

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

et al. 2021

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Ion beam analysis methods are very sensitive to analyze the defects and impurities in insulators and semiconductors. The present study focuses on an investigation of the nature of defects in monoclinic ZrO 2 and spectroscopic properties of ZrO 2 :Sm 3+ (1 mol %) phosphor using ionoluminescence (IL) under the excitation of 100 MeV Si 7+ ions. The structures of the combustion-synthesized ZrO 2 and ZrO 2 :Sm 3+ samples were revealed to be monoclinic as analyzed through X-ray diffraction, Raman spectroscopy, and selected area electron diffraction methods. Structural parameters were assessed utilizing Rietveld refinement of the obtained XRD data using GSAS II software. The average particle size of ZrO 2 and ZrO 2 :Sm 3+ samples was found to be 77 ± 2 and 72 ± 3 nm, respectively, as determined from transmission electron microscopy images. The electronic structure and the oxygen vacancy defect population were analyzed using experimental measurements [viz ionoluminescence (IL), photoluminescence (PL), PL lifetime decay, electron paramagnetic resonance (EPR), and diffuse reflectance spectroscopy (DRS)]. The prominent IL and PL emission peaks seen at 499 nm in monoclinic ZrO 2 are attributed to the F + type center that was assigned to the F 2 + centeran aggregate of the singly ionized oxygen vacancies. ZrO 2 :Sm 3+ (1 mol %) samples display Sm 3+ characteristic IL emission peaks between 562−582, 600−620, 635−673, and 719 nm, corresponding to ( 4 G 5/2 → 6 H 5/2 ), ( 4 G 5/2 → 6 H 7/2 ), ( 4 G 5/2 → 6 H 9/2 ), and ( 4 G 5/2 → 6 H 11/2 ) transitions under 100 MeV Si 7+ ion excitation for various fluences. The 100 MeV Si 7+ ion-induced ion track radius (damaged cross section) and local temperature were estimated through the thermal spike model to be 0.53 nm and 700 K (the duration is about 10 −13 second), respectively. CIE coordinates fall near the yellow color region and then slightly shift toward the green color region with an increase of fluence because of the lattice distortion and change of the Sm 3+ symmetry site.

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Section: Introductionmentioning

confidence: 97%

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

et al. 2021

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“…Zirconium (IV) oxynitrate hydrate (∼99%), carbohydrazide (∼98%) and erbium nitrate pentahydrate (∼99.9%) were used as starting materials. The procedure used for the synthesis is described elsewhere [13]. Pellets of size 5 mm dia and 1 mm thick were made using a custom pelletizer.…”

Section: Methodsmentioning

confidence: 99%

Down and upconversion photoluminescence of ZrO₂:Er³⁺ phosphor irradiated with 120 MeV gold ions

Lokesha

Nagabhushana

Chithambo

et al. 2020

Mater. Res. Express

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Down conversion and upconversion photoluminescence of pristine and gold ion irradiated ZrO 2 :Er 3+ phosphor synthesized by solution combustion are reported. The crystallinity of the sample as analysed by x-ray diffraction shows a monoclinic phase having a crystallite size of about 57 nm calculated using Williamson-Hall formula. Field emission scanning electron microscopy shows that the shape and size of phosphor grains are non uniform. The down conversion photoluminescence of ZrO 2 :Er 3+ has sharp emission bands in the red, green and blue regions of the spectrum. These emissions are corresponding to f-f transitions of Er 3+ ions under excitation of 379 nm. In particular, the emission has maxima at 467, 492, 526, 548 and 660 nm correspond to 4 F 3/2 → 4 I 15/2 , 4 F 7/2 → 4 I 15/2 , 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions respectively. Interestingly, the PL emission intensity (excitation at 379 nm) is enhanced 1.6 times higher than pristine sample after 120 MeV Au ion irradiation for a fluence of 1×10 10 ions cm −2 . The blue to green emission ratio increases with the increase in ion fluence. Therefore, emission of the color shift towards bluish-white color with ion fluence. The lifetime of 4 S 3/2 level is found to be 16.9 and 71.5 μs for pristine and Au ion irradiated (1×10 12 ions cm −2 ) ZrO 2 :Er 3+ respectively. In near infrared (NIR) region, the PL emission band is observed at 1531 nm corresponding to 4 I 13/2 → 4 I 15/2 transition of Er 3+ under excitation of 980 nm. The sample emits intense green emission and relatively weak red emission in up conversion PL under excitation of 980 nm. The ratio of intensities of red and green emission changes after Au ion irradiation is attributed to the corresponding change in the lattice symmetry in the host. Resulting in strong up conversion emission from two photon absorption process.

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“…(1). Данная методика успешно применяется в ТСЛ дозиметрии ионизирующих излучений при исследовании широкозонных материалов [20][21][22][23]30,31].…”

Section: образцы и методыunclassified

“…Полученные результаты согласуются с нашими исследованиями ФЛ-свойств нанотубулярных слоев ZrO 2 [10], для которых регистрируются также две полосы свечения гауссовой формы с E max = 2.43 ± 0.01 и 2.68 ± 0.03 eV, а также ω = 0.35 ± 0.01 и 0.48 ± 0.02 eV соответственно. Кроме того, в независимых исследованиях образцов порошков моноклинного ZrO 2 в спектрах ТСЛ [7,[19][20][21][22][23][24][25][26], ФЛ [7,23,25,26] и импульсной катодолюминесценции [7,25] регистрируется широкая неэлементарная полоса свечения в диапазоне 400−650 nm (3.10−1.91 eV) с максимумом в области 480−500 nm (2.58−2.48 eV).…”

Section: спектральные характеристики тслunclassified

“…Ранее нанотрубки ZrO 2 -nt, полученные методом анодирования, были изучены с использованием спектральных методик фотолюминесценции (ФЛ) [10][11][12][13][14][15][16][17] и гальванолюминесценции [18]. Кроме того, в ряде работ методами термостимулированной люминесценции (ТСЛ) в спектральной области 400−650 nm были исследованы порошки моноклинного ZrO 2 в исходном состоянии и после высокотемпературных обработок на воздухе [7,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], в вакууме [35] или в атмосфере аргона [26]. Были получены экспериментальные подтверждения наличия ловушек носителей заряда, активных ниже комнатной температуры (223−293 K) [26] и в широком температурном диапазоне от 300 до 750 K [7,[19][20][21][22][23][24][25] после облучения образцов электронным пучком [7,19,25], β- [20][21][22][23] или УФ-излучением [24,…”

Section: Introductionunclassified

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Механизмы Термостимулированной Люминесценции В Уф-Облученных Нанотрубках Диоксида Циркония

Петренёв¹,

Вохминцев²,

Старовойтова³

et al. 2021

Физика Твердого Тела

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Evidence of luminescence modification with structure of zirconia phases

Cited by 18 publications

References 34 publications

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Down and upconversion photoluminescence of ZrO₂:Er³⁺ phosphor irradiated with 120 MeV gold ions

Механизмы Термостимулированной Люминесценции В Уф-Облученных Нанотрубках Диоксида Циркония

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Evidence of luminescence modification with structure of zirconia phases

Cited by 18 publications

References 34 publications

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO2 and Spectroscopic Properties of ZrO2:Sm3+ Phosphor

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO2 and Spectroscopic Properties of ZrO2:Sm3+ Phosphor

Down and upconversion photoluminescence of ZrO2:Er3+ phosphor irradiated with 120 MeV gold ions

Механизмы Термостимулированной Люминесценции В Уф-Облученных Нанотрубках Диоксида Циркония

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Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Down and upconversion photoluminescence of ZrO₂:Er³⁺ phosphor irradiated with 120 MeV gold ions