Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 409, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2021.113146
Keywords
Calcium ultraphosphate; Eu3+; Phosphor; UV photoluminescence
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In this study, CaP4O11 was explored as a host material for phosphors for solid-state lighting applications for the first time. The Eu3+-doped CaP4O11 ultraphosphate compound exhibited orange-red emission under UV excitation and has potential applications in solid state lighting based on LED technology.
In the present work, CaP4O11 was explored as a host material of phosphors for solid-state lighting applications for the first time. This ultraphosphate compound doped with Eu3+ ions was prepared via the solid-state reaction in air atmosphere. The photoluminescence properties were investigated under (UV) ray excitation. From a powder X-ray diffraction analysis, structural Rietveld refinement and IR/Raman spectroscopy, the formation of single phase CaP4O11 with a monoclinic structure was confirmed. The spectral distribution of the Eu3+-doped CaP4O11 ultraphosphate results in an overall orange-red emission due to the non-negligible intensity of the D-5(0)-> F-7(1) transition. One Eu3+ center was attributed according to the crystal structure and the luminescence characteristics. The luminescence decay curve of CaP4O11:Eu3+ was fitted into a single exponential function and the lifetime was about 3.8 ms. The obtained CaP4O11:Eu3+ phosphors may have a potential application for solid state lighting based on light emitting diodes technology.
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