Surface Characterization and Photoluminescence Properties of Ce3 ,Eu Co-Doped SrF2 NanophosphorReportar como inadecuado




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1

Department of Physics, University of the Free State, PO Box 339, Bloemfontein, ZA 9300, South Africa

2

Department of Physics, Sudan University of Science and Technology, Khartoum 11113, Sudan

3

Department of Physics, Chemistry and Biology, Linköping University, Linköping S-581 83, Sweden





*

Authors to whom correspondence should be addressed.



Academic Editor: Dirk Poelman

Abstract SrF2:Eu,Ce3+ nanophosphors were successfully synthesized by the hydrothermal method during down-shifting investigations for solar cell applications. The phosphors were characterized by X-ray diffraction XRD, scanning Auger nanoprobe, time of flight-secondary ion mass spectrometry TOF-SIMS, X-ray photoelectron spectroscopy XPS and photoluminescence PL spectroscopy. XRD showed that the crystallite size calculated with Scherrer’s equation was in the nanometre scale. XPS confirmed the formation of the matrix and the presence of the dopants in the SrF2 host. The PL of the nanophosphor samples were studied using different excitation sources. The phenomenon of energy transfer from Ce3+ to Eu2+ has been demonstrated. View Full-Text

Keywords: SrF2; cerium; TOF-SIMS; XPS; shake-down; energy transfer SrF2; cerium; TOF-SIMS; XPS; shake-down; energy transfer





Autor: Mubarak Y. A. Yagoub 1,2, Hendrik C. Swart 1,* , Luyanda L. Noto 1, Peber Bergman 3 and Elizabeth Coetsee 1,*

Fuente: http://mdpi.com/



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