Luminescence of Eu[sup 2+]- and Pb[sup 2+]-activated alkaline-earth oxyhalides M[sub 4]OX[sub 6] (M = Ca, Sr, Ba; X = Cl, Br)
- Univ. of Utrecht (Netherlands)
The luminescence properties of Ba[sub 3.96]Eu[sub 0.04]OCl[sub 6], Ba[sub 3.96]Eu[sub 0.04]OBr[sub 6], Sr[sub 3.96]Eu[sub 0.04]OCl[sub 6], Sr[sub 3.96]Eu[sub 0.04]OBr[sub 6], Ca[sub 3.96]Eu[sub 0.04]OCl[sub 6], Eu[sub 4]OCl[sub 6], and Eu[sub 4]OBr[sub 6] are reported and discussed. All compositions show an efficient blue emission under UV and X-ray excitation.From the similarity of the luminescence properties of these materials, it si concluded that the luminescence properties of Eu[sup 2+] are strongly determined by the oxide ion in the crystal structure. In Eu[sub 4]OCl[sub 6] and Eu[sub 4]OB[sub 6] no concentration quenching of the luminescence is observed. The luminescence properties of the alkaline-earth oxyhalides doped with lead are also reported. The Pb[sup 2+] ion exhibits a blue emission in the strontium oxyhalides. In addition a red emission of unknown nature is observed. 25 refs., 5 figs., 2 tabs.
- OSTI ID:
- 6493447
- Journal Information:
- Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 4:3; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360606* -- Other Materials-- Physical Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BROMINE COMPOUNDS
CALCIUM COMPOUNDS
CHLORINE COMPOUNDS
CRYSTAL DOPING
ELEMENTS
EUROPIUM
HALOGEN COMPOUNDS
LEAD
LUMINESCENCE
METALS
OXYBROMIDES
OXYCHLORIDES
OXYGEN COMPOUNDS
OXYHALIDES
RARE EARTHS
STRONTIUM COMPOUNDS