• Synthesis and luminescence in sol–gel auto-combustion-synthesized CaSnO$_3$:Eu$^{3+}$ phosphor

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      https://www.ias.ac.in/article/fulltext/boms/040/07/1347-1354

    • Keywords

       

      CaSnO$_3$; sol–gel preparation; doping; luminescence.

    • Abstract

       

      Undoped and Eu-doped CaSnO$_3$ nanopowders were prepared by a facile sol–gel auto-combustion methodcalcined at 800$^{\circ}$C for 1 h. The samples are found to be well-crystallized pure orthorhombic CaSnO$_3$ structure. Photoluminescence (PL) measurements indicated that the undoped sample exhibits a broad blue emission at about 420–440 nm, which can be recognized from an intrinsic centre or centres in CaSnO$_3$. Eu-doped CaSnO$_3$ showed broad blue emission centred about 434 nm, a weak peak at 465 nm and a sharp intense yellow emission line at 592 nm. The emission situated at 592 nm was assigned to the f–f transition of ${}^5$D$_0$ $\to$ ${}^7$F$_1$ in Eu$^{3+}$ ions. The afterglow emission and PL decay results in Eu-doped CaSnO$_3$ phosphor, which revealed that there are at least two different traps in this phosphor. From the obtained results, Eu$^{3+}-doped CaSnO$_3$ phosphor could be proposed as a potential white luminescent optical material.

    • Author Affiliations

       

      MOGES TSEGA1 FRANCIS BIRHANU DEJENE22

      1. Department of Physics, Bahir Dar University, Bahir Dar 3019, Ethiopia
      2. Department of Physics, University of the Free State, QwaQwa Campus, Private Bag X13, Phuthaditjhaba 9866, South Africa
    • Dates

       
  • Bulletin of Materials Science | News

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