SAIP2016

Blue-yellow luminescence of Eu-doped CaSnO3 nanopowders synthesized by the sol-gel autocombustion process

5 Jul 2016, 16:10

1h 50m

Kramer Law building

Board: A.069

Poster Presentation Track A - Division for Physics of Condensed Matter and Materials Poster Session (1)

Speakers

Prof. F. Birhanu Dejene (UFS) Dr Moges Tsega Yihunie (University of the Free State (qwaqwa campus))

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

No

Main supervisor (name and email)<br>and his / her institution

F.B. Dejene,DejeneBF@ufs.ac.za, UFS

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

Posdc

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

Undoped and Eu-doped CaSnO3 nanopowders were prepared by a facile sol-gel autocombustion method calcined at 800 oC for 1h. The crystal structure of the nanopowders is identified by the X-ray diffreaction (XRD) technique, and it is found that all samples showed pure orthorhombic CaSnO3 structure. Photoluminsence measurements indicated that the undoped sample exhibits a broad blue emission at about 420440 nm, which can be attributed to the recombination of self-trapped excitons. Additional sharp emission lines at 465, 592 nm were obtained in the Eu-doped CaSnO3 sample and these emission lines were assigned to the f-f transition of 5D15D0, 5D07F1 in Eu3+ ions. The mixture of this blue and yellow luminescence gives white color in Eu-doped doped CaSnO3 sample under UV excitation.

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

No

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Presentation Materials

notes

Supervisor agreement