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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Дата: | 2004 |
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НТК «Інститут монокристалів» НАН України
2004
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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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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 |
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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 |
_version_ |
1837249101081608192 |
fulltext |
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