Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 4, Pages 4131-4138Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b19500
Keywords
Ce3+ doping; contactless pressure gauge; compression in DAC; lanthanide ions (Ln(3+)); luminescent functional materials; Y6Ba4(SiO4)(6)F-2 apatite phosphors
Funding
- Polish National Science Centre [2016/23/D/ST4/00296]
- National Natural Science Foundations of China [51672257]
- Fundamental Research Funds from China University of Geosciences, Beijing [2652017091]
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A novel, contactless optical sensor of pressure based on the luminescence red-shift and bandwidth (full width at half-maximum, fwhm) of the Ce3+-doped fluorapatite-Y6Ba4(SiO4)(6)F-2 powder has been successfully synthesized via a facile solid-state method. The obtained material exhibits a bright blue emission under UV light excitation. It was characterized using powder X-ray diffraction, scanning electron microscopy and luminescence spectroscopy, including high-pressure measurements of excitation and emission spectra, up to above similar to 30 GPa. Compression of the material resulted in a significant red-shift of the allowed 4f -> 5d and 5d -> 4f transitions of Ce3+ in the excitation and emission spectra, respectively. The pressure-induced monotonic shift of the emission band, as well as changes in the excitation/emission band widths, have been correlated with pressure for sensing purposes. The material exhibits a high pressure sensitivity (d lambda/dP approximate to 0.63 nm/GPa) and outstanding signal intensity at high-pressure conditions (similar to 90% of the initial intensity at around 20 GPa) with minimal pressure-induced quenching of luminescence.
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