Effect of Mn substitution on electronic structure of Ca9Y(PO4)(7):Eu2+, Mn2+ phosphor determined by X-ray absorption spectroscopy
Journal
Chemical Physics Letters
Journal Volume
515
Journal Issue
4-6
Pages
245-248
Date Issued
2011
Author(s)
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.
Abstract
The single-composition Ca9Y(PO4)7:Eu 2+, Mn2+ 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. © 2011 Elsevier B.V. All rights reserved.
SDGs
Type
journal article