Effect of Mn substitution on electronic structure of Ca 9Y(PO4)7:Eu2+, Mn2+ phosphor determined by X-ray absorption spectroscopy

Y. R. Lu, C. H. Huang, Teng-Ming Chen, J. H. Lin, Y. R. Ma, J. L. Chen, C. C. Hsu, C. L. Chen, C. L. Dong*, T. S. Chan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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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.

Original languageEnglish
Pages (from-to)245-248
Number of pages4
JournalChemical Physics Letters
Issue number4-6
StatePublished - 27 Oct 2011

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