• FRANCIS BIRHANU DEJENE2

Articles written in Bulletin of Materials Science

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

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.

• # Bulletin of Materials Science

Current Issue
Volume 42 | Issue 6
December 2019

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019