Title: Effect of Mn substitution on electronic structure of Ca(9)Y(PO(4))(7):Eu(2+), Mn(2+) phosphor determined by X-ray absorption spectroscopy
Authors: Lu, Y. R.
Huang, C. H.
Chen, T. M.
Lin, J. H.
Ma, Y. R.
Chen, J. L.
Hsu, C. C.
Chen, C. L.
Dong, C. L.
Chan, T. S.
Department of Applied Chemistry
Issue Date: 27-Oct-2011
Abstract: The single-composition Ca(9)Y(PO(4))(7):Eu(2+), Mn(2+) phosphors were synthesized by a solid-state reaction. The luminescent properties and electronic structures were investigated by photoluminescence (PL) and X-ray absorption near-edge structure (XANES). The PL demonstrated energy transfer and a red-shift as the Mn doping level was increased. The energy transfer is ascribed to charge transfer between Eu and Mn. The change of the PL intensity is caused by the increased O 2p-Mn 3d hybridization. The narrowing of the band gap, which finding is supported by the red-shift, is responsible for the formation of the Mn-related states close to the conduction band minimum. (C) 2011 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.cplett.2011.09.052
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2011.09.052
Volume: 515
Issue: 4-6
Begin Page: 245
End Page: 248
Appears in Collections:Articles