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Inne
Luminescence study of Eu3+-doped garnet phosphors : relating structure to emission.
Autorzy
Rok wydania
2017
Czasopismo
Journal of Alloys and Compounds
Numer woluminu
695
Strony
1160-1165
DOI
10.1016/j.jallcom.2016.10.243
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
A series of Eu³⁺-doped garnets of the general formula A3B2X3O12 (A = Sr,Ca; B=Sc,Y; X = Si,Ge) was obtained using a high temperature solid state reaction. These compounds were characterized by X-ray diffraction and photoluminescence spectroscopy. The relation between the luminescence properties of phosphors and their host lattice composition was studied. It was found that Eu³⁺ ions occupied the A site in compounds with smaller cell volume (Ca3Sc2Si3O12, Ca3Sc2Ge3O12 and Sr3Sc2Ge3O12) and both A and B sites in compounds with bigger cell volume (Ca3Y2Ge3O12 and Sr3Y2Ge3O12). This study showed the relationship between the host lattice composition and the energy of the charge transfer (CT) transition, 4f→4f/CT, ⁵D0→⁷F2/⁵D0→⁷F1 and ⁵D0→⁷F4/⁵D0→⁷F1 intensity ratios and splitting of the ⁷F1 level by the crystal field. Decay t
Słowa kluczowe
optical materials, Solid state reactions, luminescence
Adres publiczny
http://dx.doi.org/10.1016/j.jallcom.2016.10.243
Strona internetowa wydawcy
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