OPTICAL AND LUMINESCENCE PROPERTIES OF LITHIUM GADOLINIUM ORTHOBORATE CRYSTALS

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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.
Original languageEnglish
Pages (from-to)32-35
Number of pages4
JournalИзвестия высших учебных заведений. Физика
Volume57
Issue number12-3
Publication statusPublished - 2014

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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

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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",
volume = "57",
pages = "32--35",
journal = "Известия высших учебных заведений. Физика",
issn = "0021-3411",
publisher = "Национальный исследовательский Томский государственный университет",
number = "12-3",

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TY - JOUR

T1 - OPTICAL AND LUMINESCENCE PROPERTIES OF LITHIUM GADOLINIUM ORTHOBORATE CRYSTALS

AU - Kisileva, Maria Sergeevna

AU - Ogorodnikov, Igor Nikolaevich

AU - Sedunova, Irina Nikolaevna

AU - Vostrov, Dmitriy Olegovich

AU - Yakovlev, Viktor Yuryevich

PY - 2014

Y1 - 2014

N2 - 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.

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.

UR - https://elibrary.ru/item.asp?id=23815745

M3 - Article

VL - 57

SP - 32

EP - 35

JO - Известия высших учебных заведений. Физика

JF - Известия высших учебных заведений. Физика

SN - 0021-3411

IS - 12-3

ER -