Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt

Specific formation features of isolated dipole centers (IDC) Eu²⁺-Vcs (impurity-cationic vacancy) and aggregate centers (AC) of photoluminescence (PL) in CsBr:Eu2+ crystals have been studied. These centers provide the PL with maxima in 435-450 nm and 490-520 nm regions. The centers causing the PL pe...

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Бібліографічні деталі
Дата:2004
Автори: Zorenko, Yu.V., Turchak, R.M., Konstankevich, I.V.
Формат: Стаття
Мова:English
Опубліковано: НТК «Інститут монокристалів» НАН України 2004
Назва видання:Functional Materials
Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/139678
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt / Yu.V. Zorenko, R.M. Turchak, I.V. Konstankevich // Functional Materials. — 2004. — Т. 11, № 4. — С. 707-709. — Бібліогр.: 10 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id irk-123456789-139678
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spelling irk-123456789-1396782018-06-23T03:04:12Z Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt Zorenko, Yu.V. Turchak, R.M. Konstankevich, I.V. Specific formation features of isolated dipole centers (IDC) Eu²⁺-Vcs (impurity-cationic vacancy) and aggregate centers (AC) of photoluminescence (PL) in CsBr:Eu2+ crystals have been studied. These centers provide the PL with maxima in 435-450 nm and 490-520 nm regions. The centers causing the PL peaked at 490-520 nm have been found to be formed within a narrow Eu²⁺ concentration range (0.01 to 0.1 mol.%) and at temperatures up to 180-200°C. It has been supposed that in the CsBr:Eu²⁺ crystals, besides of the IDC responsible for the PL peaked at 440 nm, several AC types can be observed, in particular, CsEuBr₃ and Cs₄EuBr₆ nanocrystals as well as EuBr₂ precipitates. Исследованы особенности образования изолированных дипольных центров (ИДЦ) типа Eu²⁺-Vcs ("примесь-катионная вакансия") и агрегатных центров (АЦ) фотолюминесценции (ФЛ) в кристаллах CsBr:Eu²⁺, обусловливающих ФЛ в спектральной области с максимумами при 435-450 нм и 490-520 нм. Установлено, что центры ФЛ с максимумами при 490-520 нм образуются в узкой области концентраций Eu²⁺ (0,010,1 мол.%) при температурах до 180-200°C. Высказано предположение, что помимо ИДЦ отвечающих за ФЛ с максимумом при 440 нм, в кристаллах CsBr:Eu²⁺ могут наблюдаться несколько типов АЦ, в частности, нанокристаллы соединений CsEuBr₃, Cs₄EuBr₆ и преципитаты EuBr₂ . Досліджено особливості утворення ізольованих дипольних цєнтрів (ВДЦ) типу Eu²⁺-Vcs ("домшка-катюнна вакансія") і агрегатних центрів (АЦ) фотолюмінесценції (ФЛ) у кристалах CsBr:Eu²⁺, що обумовлюють ФЛ у спектральній області з максимумами при 435-450 нм і 490-520 нм. Встановлено, що центри ФЛ з максимумами при 490520 нм утворюються у вузькій області концентрацій Eu²⁺ (0,01-0,1 мол.%) при температурах до 180-200°C. Висловлено припущення, що крім ВДЦ, що відповідають за ФЛ з максимумом при 440 нм, у кристалах CsBr:Eu²⁺ можуть спостерігатися декілька типів АЦ, зокрема, нанокристали сполук CsEuBr₃, Cs₄EuBr₆ і преципітати EuBr₂. 2004 Article Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt / Yu.V. Zorenko, R.M. Turchak, I.V. Konstankevich // Functional Materials. — 2004. — Т. 11, № 4. — С. 707-709. — Бібліогр.: 10 назв. — англ. 1027-5495 http://dspace.nbuv.gov.ua/handle/123456789/139678 en Functional Materials НТК «Інститут монокристалів» НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description Specific formation features of isolated dipole centers (IDC) Eu²⁺-Vcs (impurity-cationic vacancy) and aggregate centers (AC) of photoluminescence (PL) in CsBr:Eu2+ crystals have been studied. These centers provide the PL with maxima in 435-450 nm and 490-520 nm regions. The centers causing the PL peaked at 490-520 nm have been found to be formed within a narrow Eu²⁺ concentration range (0.01 to 0.1 mol.%) and at temperatures up to 180-200°C. It has been supposed that in the CsBr:Eu²⁺ crystals, besides of the IDC responsible for the PL peaked at 440 nm, several AC types can be observed, in particular, CsEuBr₃ and Cs₄EuBr₆ nanocrystals as well as EuBr₂ precipitates.
format Article
author Zorenko, Yu.V.
Turchak, R.M.
Konstankevich, I.V.
spellingShingle Zorenko, Yu.V.
Turchak, R.M.
Konstankevich, I.V.
Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt
Functional Materials
author_facet Zorenko, Yu.V.
Turchak, R.M.
Konstankevich, I.V.
author_sort Zorenko, Yu.V.
title Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt
title_short Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt
title_full Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt
title_fullStr Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt
title_full_unstemmed Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt
title_sort specific features of photoluminescence centers in csbr:eu²⁺ crystals grown from melt
publisher НТК «Інститут монокристалів» НАН України
publishDate 2004
url http://dspace.nbuv.gov.ua/handle/123456789/139678
citation_txt Specific features of photoluminescence centers in CsBr:Eu²⁺ crystals grown from melt / Yu.V. Zorenko, R.M. Turchak, I.V. Konstankevich // Functional Materials. — 2004. — Т. 11, № 4. — С. 707-709. — Бібліогр.: 10 назв. — англ.
series Functional Materials
work_keys_str_mv AT zorenkoyuv specificfeaturesofphotoluminescencecentersincsbreu2crystalsgrownfrommelt
AT turchakrm specificfeaturesofphotoluminescencecentersincsbreu2crystalsgrownfrommelt
AT konstankevichiv specificfeaturesofphotoluminescencecentersincsbreu2crystalsgrownfrommelt
first_indexed 2025-07-10T08:47:56Z
last_indexed 2025-07-10T08:47:56Z
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