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Donor Centers Involved into the Quantum Cutting in Ytterbium-Doped Scheelite-Like Crystalsстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Дата последнего поиска статьи во внешних источниках: 7 июля 2020 г.
- Авторы: Subbotin Kirill A., Titov Anatolii I., Lis Denis A., Sani Elisa, Smirnov Valerii A., Alimov Olimkhon K., Zharikov Evgenii V., Shcherbakov Ivan A.
- Журнал: Physica Status Solidi A
- Том: 217
- Номер: 4
- Год издания: 2020
- Первая страница: 1900659-1
- Последняя страница: 1900659-8
- DOI: 10.1002/pssa.201900659
- Аннотация: Yb-doped Scheelite-like molybdate and tungstate single crystals are promising quantum-cutting materials. The cooperative downconversion from donor centers to Yb ions occurs in heavily Yb-doped crystals of this family. This phenomenon can substantially raise the efficiency of crystalline silicon photovoltaic cells. However, the nature of donor centers is still unknown. Herein, several versions of this nature are tested and discussed: Yb3+ ion (its high-energy charge transfer states); Yb2+ ion; self-trapped exciton at molybdate/tungstate complex; color centers based on oxygen vacancies; accidental impurities. To test these assumptions, a series of Scheelite-like molybdate and tungstate single crystals (CaMoO4, CaWO4, NaLa(MoO4)(2), NaGd(MoO4)(2), NaGd(WO4)(2), and NaY1-xGdx(WO4)(2)) are grown, both undoped and doped with different Yb-concentrations. The complex spectroscopic investigations of these crystals are performed. As a result of the studies, three versions, self-trapped excitons at [MoO4]/[WO4] complexes, color centers at oxygen vacancies, and accidental impurities, coming into the crystals with MoO3, are rejected. The applicability of the other versions should be refined.
- Добавил в систему: Коновко Андрей Андреевич