Research output: Contribution to journal › Article › peer-review
Asymmetry ratio as a parameter of Eu3+ local environment in phosphors. / Колесников, Илья Евгеньевич; Поволоцкий, Алексей Валерьевич; Мамонова, Дарья Владимировна; Колесников, Евгений Ю.; Курочкин, Алексей Викторович; Lähderanta, Erkki; Михайлов, М.Д.
In: Journal of Rare Earths, Vol. 36, No. 5, 2018, p. 474-481.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Asymmetry ratio as a parameter of Eu3+ local environment in phosphors
AU - Колесников, Илья Евгеньевич
AU - Поволоцкий, Алексей Валерьевич
AU - Мамонова, Дарья Владимировна
AU - Колесников, Евгений Ю.
AU - Курочкин, Алексей Викторович
AU - Lähderanta, Erkki
AU - Михайлов, М.Д.
PY - 2018
Y1 - 2018
N2 - Study of the local environment of certain ion is quite a complex problem. Due to the unique luminescent properties, Eu 3+ ions can be used as a structural probe. In this paper, effect of doping concentration, excitation wavelength and excitation mechanism on asymmetry ratio was systematically studied using Y 3Al 5O 12:Eu 3+, YVO 4:Eu 3+ and Y 2O 3:Eu 3+nanophosphors. The asymmetry ratio gives information about the local surrounding and environmental changes around the Eu 3+ ions. Asymmetry ratios of YAG:Eu 3+ and YVO 4:Eu 3+ nanopowders were calculated using standard technique and the obtained average values were found to be 0.75 and 8.2, respectively. However, it is found that standard method of asymmetry ratio calculation is suitable only for samples where all Eu 3+ ions occupy one site. The “multisite model” of asymmetry ratio calculation was developed and used for Y 2O 3:Eu 3+ nanocrystalline powders. Average value of asymmetry ratio for Eu 3+ ions occupied “normal” sites is 6.0 and for Eu 3+ ions occupied “defect” sites is 2.3.
AB - Study of the local environment of certain ion is quite a complex problem. Due to the unique luminescent properties, Eu 3+ ions can be used as a structural probe. In this paper, effect of doping concentration, excitation wavelength and excitation mechanism on asymmetry ratio was systematically studied using Y 3Al 5O 12:Eu 3+, YVO 4:Eu 3+ and Y 2O 3:Eu 3+nanophosphors. The asymmetry ratio gives information about the local surrounding and environmental changes around the Eu 3+ ions. Asymmetry ratios of YAG:Eu 3+ and YVO 4:Eu 3+ nanopowders were calculated using standard technique and the obtained average values were found to be 0.75 and 8.2, respectively. However, it is found that standard method of asymmetry ratio calculation is suitable only for samples where all Eu 3+ ions occupy one site. The “multisite model” of asymmetry ratio calculation was developed and used for Y 2O 3:Eu 3+ nanocrystalline powders. Average value of asymmetry ratio for Eu 3+ ions occupied “normal” sites is 6.0 and for Eu 3+ ions occupied “defect” sites is 2.3.
UR - http://www.scopus.com/inward/record.url?scp=85042181857&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/asymmetry-ratio-parameter-eu3-local-environment-phosphors
U2 - 10.1016/j.jre.2017.11.008
DO - 10.1016/j.jre.2017.11.008
M3 - Article
VL - 36
SP - 474
EP - 481
JO - Journal of Rare Earths
JF - Journal of Rare Earths
SN - 1002-0721
IS - 5
ER -
ID: 25927697