Site occupancy and phonon sideband of trivalent europium doped calcium aluminosilicate phosphors
作者： Ho Van Tuyen , Phan Van Do , Nguyen Ha Vi , A.N.H. Thuan , Nguyen Thi Quynh Lien
DOI: 10.1016/J.IJLEO.2021.166944
关键词: Luminescence 、 Excited state 、 Phosphor 、 Analytical chemistry 、 Materials science 、 Ion 、 Europium 、 Raman spectroscopy 、 Calcium aluminosilicate 、 Phonon
摘要: Abstract A series of Eu3+ doped Ca2Al2SiO7 were synthesized by the solid-state reaction method. Structural and luminescent properties obtained samples investigated through X-ray diffraction, Raman luminescence spectra. The characteristic 5D0 → 7F0,1 transitions from emission spectra ions showed that occupy at two different sites in lattice. Ca2Al2SiO7:Eu3+ red phosphors have three phonon sidebands with energies ~ 673 cm-1, 848 cm-1 1443 cm-1 which been determined via excitation materials. These coincided vibrational observed multiphonon relaxation rates for excited levels 5D1, 5D2 5D3 also calculated.
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