Effect of partial substitution of Ca for Sr on crystal structure and luminescence of Ce-doped Sr4Al14O25

Monophasic undoped and cerium-doped Sr4Al14O25 samples with partial substitution of calcium for strontium were prepared using conventional solid-state synthesis. Structural studies revealed that substitution of strontium by calcium in Sr4-xCaxAl14O25 up to x = 1.4 is possible without formation of ad...

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Bibliographic Details
Published in:Journal of solid state chemistry 2019-06, Vol.274, p.116-123
Main Authors: Misevicius, M., Jonikavicius, K., Jørgensen, J.-E., Balevicius, V.
Format: Article
Language:English
Subjects:
Crystal structure
Luminescence
Optical properties
Oxides
X-ray diffraction
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Summary:Monophasic undoped and cerium-doped Sr4Al14O25 samples with partial substitution of calcium for strontium were prepared using conventional solid-state synthesis. Structural studies revealed that substitution of strontium by calcium in Sr4-xCaxAl14O25 up to x = 1.4 is possible without formation of additional phases and that the Sr2 site (of two possible) is more likely to be substituted by the smaller Ca ions. Photoluminescence measurements of Sr4Al14O25:Ce showed emission with double peak (360 and 380 nm) under 330 nm excitation wavelength. The effect of partial substitution of strontium by calcium on the luminescence of Sr4-xCaxAl14O25:Ce (emission, quantum yield, decay) were studied as well. [Display omitted] •Monophasic pure and modified Sr4Al14O25 samples were prepared.•Sr was partially substituted by Ca without change in phase composition.•Ce-doped Sr4Al14O25 samples (unsubstituted and partially substituted) were prepared.•Effect of partial substitution on luminescence was studied.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2019.03.026