OPTICAL AND LUMINESCENCE PROPERTIES OF LITHIUM GADOLINIUM ORTHOBORATE CRYSTALS

Результат исследований: Вклад в журналСтатьяНаучно-исследовательскаярецензирование

Аннотация

We present the research results on transient optical absorption (TOA) and luminescence for lithium-gadolinium orthoborate Li 6GdB 3O 9 (LGBO) in the visible and ultraviolet spectral regions. According to absorption optical spectroscopy with nanosecond time resolution studies the LGBO TOA is caused by optical transitions in hole centers. The optical density relaxation kinetics is governed by interdefect tunneling recombination between these centers and neutral lithium atoms acting as electronic Li 0 centers. At 290 K Li 0 centers are involved in thermally stimulated migration, which is not accompanied by carrier transfer to the conduction or valence band. We suppose that diffusion-limited annihilation of lithium interstitials with vacancies is responsible for the slow TOA decay kinetics component with characteristic times ranging from a few milliseconds to seconds. The mechanisms of defect creation and short-living Frenkel pairs relaxation in the LGBO cation sublattice were analyzed.
Язык оригиналаАнглийский
Страницы (с-по)32-35
Число страниц4
ЖурналИзвестия высших учебных заведений. Физика
Том57
Номер выпуска12-3
СостояниеОпубликовано - 2014

Отпечаток

gadolinium
Gadolinium
luminescence
lithium
Light absorption
Luminescence
Lithium
crystal
Crystals
Kinetics
Optical transitions
Density (optical)
Valence bands
Conduction bands
kinetics
Vacancies
Positive ions
recombination
defect
Atoms

ГРНТИ

  • 29.31.00 Оптика

Уровень публикации

  • Перечень ВАК

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title = "OPTICAL AND LUMINESCENCE PROPERTIES OF LITHIUM GADOLINIUM ORTHOBORATE CRYSTALS",
abstract = "We present the research results on transient optical absorption (TOA) and luminescence for lithium-gadolinium orthoborate Li 6GdB 3O 9 (LGBO) in the visible and ultraviolet spectral regions. According to absorption optical spectroscopy with nanosecond time resolution studies the LGBO TOA is caused by optical transitions in hole centers. The optical density relaxation kinetics is governed by interdefect tunneling recombination between these centers and neutral lithium atoms acting as electronic Li 0 centers. At 290 K Li 0 centers are involved in thermally stimulated migration, which is not accompanied by carrier transfer to the conduction or valence band. We suppose that diffusion-limited annihilation of lithium interstitials with vacancies is responsible for the slow TOA decay kinetics component with characteristic times ranging from a few milliseconds to seconds. The mechanisms of defect creation and short-living Frenkel pairs relaxation in the LGBO cation sublattice were analyzed.",
author = "Kisileva, {Maria Sergeevna} and Ogorodnikov, {Igor Nikolaevich} and Sedunova, {Irina Nikolaevna} and Vostrov, {Dmitriy Olegovich} and Yakovlev, {Viktor Yuryevich}",
year = "2014",
language = "English",
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journal = "Известия высших учебных заведений. Физика",
issn = "0021-3411",
publisher = "Национальный исследовательский Томский государственный университет",
number = "12-3",

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OPTICAL AND LUMINESCENCE PROPERTIES OF LITHIUM GADOLINIUM ORTHOBORATE CRYSTALS. / Kisileva, Maria Sergeevna; Ogorodnikov, Igor Nikolaevich; Sedunova, Irina Nikolaevna; Vostrov, Dmitriy Olegovich; Yakovlev, Viktor Yuryevich.

В: Известия высших учебных заведений. Физика, Том 57, № 12-3, 2014, стр. 32-35.

Результат исследований: Вклад в журналСтатьяНаучно-исследовательскаярецензирование

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AU - Yakovlev, Viktor Yuryevich

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AB - We present the research results on transient optical absorption (TOA) and luminescence for lithium-gadolinium orthoborate Li 6GdB 3O 9 (LGBO) in the visible and ultraviolet spectral regions. According to absorption optical spectroscopy with nanosecond time resolution studies the LGBO TOA is caused by optical transitions in hole centers. The optical density relaxation kinetics is governed by interdefect tunneling recombination between these centers and neutral lithium atoms acting as electronic Li 0 centers. At 290 K Li 0 centers are involved in thermally stimulated migration, which is not accompanied by carrier transfer to the conduction or valence band. We suppose that diffusion-limited annihilation of lithium interstitials with vacancies is responsible for the slow TOA decay kinetics component with characteristic times ranging from a few milliseconds to seconds. The mechanisms of defect creation and short-living Frenkel pairs relaxation in the LGBO cation sublattice were analyzed.

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