Luminescence properties of solid solutions LuxY1-xPO4:Eu3

Solid solutions LuxY1-xPO4 doped with Eu3+ were synthesized by the sol-gel method. Luminescence spectra under UV and X-ray excitation and luminescence excitation spectra in the UV-VUV energy range are presented. Observed variations of the structure of 4f-4f Eu3+ lines with the composition of the sol...

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Bibliographic Details
Published in:Optical materials 2018-01, Vol.75, p.607-611
Main Authors: Levushkina, V.S., Spassky, D.A., Tretyakova, M.S., Zadneprovski, B.I., Kamenskikh, I.A., Vasil'ev, A.N., Belsky, A.
Format: Article
Language:English
Subjects:
Band structure
Energy transfer
Luminescence
LuPO4
Solid solution
YPO4
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Summary:Solid solutions LuxY1-xPO4 doped with Eu3+ were synthesized by the sol-gel method. Luminescence spectra under UV and X-ray excitation and luminescence excitation spectra in the UV-VUV energy range are presented. Observed variations of the structure of 4f-4f Eu3+ lines with the composition of the solid solution are explained by the fluctuations in the distribution of substitutional cations. The role of electronic structure modification in the fundamental absorption region with changing Y/Lu ratio is discussed and is suggested as the origin of different efficiency of energy transfer to Eu3+ in this region. Temperature dependence of the luminescence yield is related to the competition between emission centers and traps. •The broadening of Eu3+ emission peaks is caused by random distribution of Y/Lu cations.•Energy transfer efficiency to Eu3+ is determined by the change of band structure.•Charge carriers trapping considerably influence energy transfer to Eu3+.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2017.11.022