4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
Paper Review: Initial screening in progress
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Blue-yellow luminescence of Eu-doped CaSnO3 nanopowders synthesized by the sol-gel autocombustion process

Presented by Dr. Moges Tsega YIHUNIE, Prof. F. Birhanu DEJENE on 5 Jul 2016 from 16:10 to 18:00
Type: Poster Presentation
Track: Track A - Division for Physics of Condensed Matter and Materials
Board #: A.069

Abstract

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.

Award

No

Level

Posdc

Supervisor

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

Paper

Yes

Permission

No

Place

Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room:


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