8-12 July 2013
Africa/Johannesburg timezone
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Luminescent properties of Pr3+doped SrF2 at different synthesis

Presented by Mr. MYA YAGOUB on 9 Jul 2013 from 17:40 to 18:40
Type: Poster Presentation
Session: Poster1
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

Lanthanide-based luminescent materials have been extensively investigated due to their contribution to a different range of applications [1, 2]. These fluoride based luminescent materials are prominent amongst other candidates because they have lesser energy losses due to non-radiative relaxation processes [1]. Recently, the trivalent praseodymium (Pr<sup>3+</sup>) is found to be a promising ion in the lanthanide-based luminescent materials for enhancing the solar cell efficiency [3]. In addition, the emission intensity of Pr<sup>3+</sup> was found to be strongly dependant on the synthesizing procedures [2]. Nano-structure fluoride of SrF<sub>2</sub>:Pr<sup>3+</sup> was prepared by both the hydrothermal and combustion methods. X-ray diffraction patterns indicate that the samples were completely crystalized with pure face-centered cubic (space group: Fm3m). Both SrF<sub>2</sub>:Pr<sup>3+</sup> samples exhibit green-red emission centered at 488 nm under excitation wavelength 439 nm at room temperature. The dependence of the Pr<sup>3+</sup> emission and excitation on the sintering temperature were also investigated and the phosphorescence lifetimes for both synthetic techniques are reported. <b>References</b> [1] Bryan M. van der Ende, L. Aarts and A. Meijerink. Adv. Mater. <b>21</b>, 3073, (2009). [2] T. Murakami and S. Tanabe. J. Cerm. Soc. J <b>115</b> [10], 605, (2007). [3] Bryan M. van der Ende, L. Aarts and A. Meijerink. Phys. Chem. Chem. Phys. <b>11</b>, 11081, (2009).

Award

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Level

PhD

Supervisor

Dr. E Coetsee, Coetseee@ufs.ac.za (University of the Free State)

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