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Effect of partial substitution of Ca for Sr on crystal structure and luminescence of Ce-doped Sr 4 Al 14 O 25

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  • M. Misevicius, Vilnius University
  • ,
  • K. Jonikavicius, Vilnius University
  • ,
  • Jens-Erik Jørgensen
  • V. Balevicius, Vilnius University

Monophasic undoped and cerium-doped Sr 4 Al 14 O 25 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 Sr 4-x Ca x Al 14 O 25 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 Sr 4 Al 14 O 25 :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 Sr 4-x Ca x Al 14 O 25 :Ce (emission, quantum yield, decay) were studied as well.

TidsskriftJournal of Solid State Chemistry
Sider (fra-til)116-123
Antal sider8
StatusUdgivet - 2019

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