2024-03-28T22:34:58Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1456902019-08-08T06:57:39Zcom_10261_77com_10261_8col_10261_330
Tunable luminescence of broadband-excited and narrow line green emitting Y2SiO5:Ce3+, Tb3+ phosphor
Muresan, L.E.
García-Guinea, Javier
Energy transfer
Luminescence
Combustion
Rare earth
Phosphors
Yttrium silicate
L. E. Muresan [et al.]
Cerium and terbium activated white emitting yttrium silicate phosphors (Y2-x-yCexTbySiO5) having average size between 96 and 123 nm were synthesised by a gel-combustion, and their phase and crystal structures, morphologies and ultraviolet (UV)-visible spectroscopic properties were studied. All rare earth doped yttrium silicate (YSO) phosphors are well crystallized powders containing only monoclinic X2-Y2SiO5 phase. No significant changes in the cell parameters were observed with increasing of Tb amount as ionic radii of Tb3+ (0.923 Å) and Y3+ (0.9 Å) have almost the same. Under different excitations, YSO:Ce3+ exhibits blue emission due to the 5d-4f transitions of Ce3+ ions. The series of emission states at different wavelengths of YSO:Tb3+ associated to f-f transition of Tb3+ ion were detected from luminescence measurements. The emission observed at 544 nm (green) corresponding to 5D4 ¿ 7F5 of Tb3+ is strongest one. Incorporation of variable amounts of Tb3+ in the YSO host lattice determines the modification of emission colour from blue through light blue and eventually to bluish green. A possible energy transfer mechanism taking place from Ce3+ to Tb3+ was also discussed in terms of excitation and emission spectra. © 2015 Elsevier B.V.
Peer Reviewed
2017-02-24T10:23:32Z
2017-02-24T10:23:32Z
2016-02-15
2017-02-24T10:23:32Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1016/j.jallcom.2015.10.202
issn: 0925-8388
e-issn: 1873-4669
Journal of Alloys and Compounds 658: 356-366 (2016)
http://hdl.handle.net/10261/145690
10.1016/j.jallcom.2015.10.202
Sí
none
Elsevier