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NASICON-type Na3.6Lu1.8−x(PO4)3:xEu3+ phosphors: structure and luminescenceстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Krutyak Nataliya, Spassky Dmitry, Deyneko Dina V., Antropov Andrey, Morozov Vladimir A., Lazoryak Bogdan I., Nagirnyi Vitali
- Журнал: Dalton Transactions
- Том: 51
- Год издания: 2022
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 11840
- Последняя страница: 11850
- DOI: 10.1039/d2dt01741e
- Аннотация: Na3.6Lu1.8−x(PO4)3:xEu3+ phosphors were synthesized by a high-temperature solid-state reaction. A powder X-ray diffraction study revealed that homogeneous solid solutions with a NASICON-type structure were formed at 0 ≤ x ≤ 0.7. The Na3.6Lu1.8(PO4)3 structure was refined from the powder X-ray diffraction data and the cation distribution in the lattice sites of the NASICON-type structure was revealed. The refinement indicates structural disorder caused by the displacement of a part of Lu cations along the c axis inside the (Lu/Na)O6 octahedra that is confirmed by the broadened emission lines of Eu3+, which substitutes Lu cations. The highest Eu3+ luminescence intensity is found in Na3.6Lu1.8−x(PO4)3:xEu3+ for x = 0.5, whereas a further increase of the Eu3+ content leads to concentration quenching that is shown to occur due to the dipole–dipole interaction. An enhanced temperature stability of the Eu3+ emission was observed at the excitation energy of 3.23 eV. At this excitation energy, thermal quenching of the emission caused by the 7F0 → 5L7 transitions is compensated by the intensity increase of the emission related to the 7F1 → 5GJ transitions, which occurs due to the increase of the 7F1 level population, induced by a temperature rise.
- Добавил в систему: Крутяк Наталия Романовна
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