Yb2+ ion doped Ba5(PO4)3Cl phosphor was synthesized by solid state reaction. Four distinct absorption bands were observed in the Ultraviolet (UV) light region due to the electronic transitions of Yb2+ ion from 1S0 ground state to 2F5/2(t2g), 2F5/2(eg), 2F7/2(t2g), and 2F7/2(eg) excited states. The main emission wavelength of the phosphor was around 630 nm. The optimized Yb2+ ion concentration was 0.2 mol% (λexc. = 400 nm). The calculated critical distance was about 8.729 Å and the concentration quenching was observed above 0.2 mol% due to the electric dipole-dipole interaction. © 2009 Elsevier B.V. All rights reserved.

Sivakumar Vaidyanathan

Department of Chemistry

H.S. Yoo

S.W. Kim

D.Y. Jeon

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Journal	Optical Materials
Publisher	Elsevier
ISSN	09253467