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Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 августа 2019 г.
- Авторы: Leonidov I.I., Zubkov V.G., Tyutyunnik A.P., Tarakina N.V., Surat L.L., Koryakova O.V., Vovkotrub E.G.
- Журнал: Journal of Alloys and Compounds
- Том: 509
- Номер: 5
- Год издания: 2011
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 1339
- Последняя страница: 1346
- DOI: 10.1016/j.jallcom.2010.10.051
- Аннотация: Calcium yttrium tetrametagermanates Y2CaGe4O12 doped with Er3+ and Er3+/Yb3+ reveal upconversion emission in visible spectral range under near-infrared excitation, λex = 980 nm. For the solid solution ErxY2−xCaGe4O12 concentration dependencies for the green and red lines of the visible emission around 526 nm (2H11/2 → 4I15/2), 545 nm (4S3/2 → 4I15/2) and 670 nm (4F9/2 → 4I15/2) show the optimal value for the sample x = 0.2. The power dependence of the visible luminescence measured at room temperature in the low-power limit indicates two-photon upconversion process. Direct intensification of the upconversion emission signals has been achieved by ytterbium sensitizing. The other upconversion excitation mechanism in Y2CaGe4O12:Er3+ is discussed for an 808 nm incident laser irradiation. A scheme of excitation and emission routes involving ground/excited state absorption, energy transfer upconversion, nonradiative multiphonon relaxation processes in trivalent lanthanide ions in Y2CaGe4O12:Er3+ and Y2CaGe4O12:Er3+, Yb3+ has been proposed. Conditions for visible emission occurrence under quasi-resonance λex = 1064 nm excitation depending on pump power values are considered. In the low-power regime only near-infrared emission caused by the transition 4I13/2 → 4I15/2 in erbium ions has been detected.
- Добавил в систему: Леонидов Иван Ильич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | JALCOM_23398.pdf | 1,0 МБ | 30 июля 2019 [dekabrist] |