Cathodoluminescence and photoluminescence studies of undoped and Eu2+ doped SrAl2O4 phosphors prepared by combustion method

Авторы: Nazarov M., Spassky D.
Журнал: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Том: 17
Год издания: 2023
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 1148
Последняя страница: 1155
DOI: 10.1134/S1027451023050282
Аннотация: Undoped and Eu2+ doped strontium aluminate (SrAl2O4) nanosized phosphorescent powders were prepared by urea-nitrate solution combustion method at 500°C for 5 minutes. The average particle size of the powders was about 60 nm. The photoluminescent properties have been studied using the synchrotron radiation and electron excitation. The broad photoluminescence bands were observed in SrAl2O4: Eu2+ peakingat λmax = 450 and 525 nm, which arise due to transitions from the 4f 65d1 to 4f 7 configuration of the Eu2+ ions situated in two sites with different symmetry. Three additional emission bands were also observed at 250, 370 and 403 nm in undoped as well as Eu-doped samples. The bands are attributed to the intrinsic emission of self-trapped excitons (band at 250 nm) and to extrinsic emission from complexes containing structural defects (bands at 370 and 403 nm).
Добавил в систему: Спасский Дмитрий Андреевич

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