Affiliation:
1. School of Physical Science and Technology Ningbo University Ningbo Zhejiang 315211 China
2. Faculty of Chemistry Adam Mickiewicz University Uniwersytetu Poznańskiego 8 Poznań 61–614 Poland
3. School of Science Jiangsu University of Science and Technology Zhenjiang 212100 China
4. Institute of Low Temperature and Structure Research Polish Academy of Sciences Okólna 2 Wrocław 50–422 Poland
5. Departamento de Física MALTA‐Consilider Team Universidad de La Laguna Apartado de Correos 456 San Cristóbal de La Laguna Santa Cruz de Tenerife E‐38200 Spain
Abstract
AbstractTo settle the low sensitivity of luminescent manometers, the Mn2+‐activated NaY9(SiO4)6O2 red‐emitting phosphors with splendid pressure sensing performances are developed. Excited by 408 nm, the resulting products emit bright red emission originating from 4T1(4G) → 6A1 transition of Mn2+, in which the optimal concentration of the activator ion is ≈1 mol%. Moreover, the admirable thermal stability of the developed phosphors is studied and confirmed by the temperature‐dependent emission spectra, based on which the activation energy is derived to be 0.275 eV. By analyzing the pressure‐dependent Raman spectra, the structural stability of the synthesized compounds at extreme conditions is verified. Furthermore, the designed phosphors exhibit remarkable spectral red‐shift at elevated pressure. Especially, as pressure increases from 0.75 to 7.16 GPa, the emission band centroid shifts from 617.2 to 663.4 nm, resulting in a high sensitivity (dλ/dP) of 7.00 nm GPa−1, whereas the full width at half maximum (FWHM) increases from 83.0 to 110.6 nm, leading to the ultra‐high sensitivity (dFWHM/dP) of 10.13 nm GPa−1. These achievements manifest that the designed red‐emitting phosphors are appropriate for ultrasensitive optical manometry. More importantly, the developed manometer is a current global leader in sensitivity, when operating in the band‐width mode, that is, FWHM.
Funder
National Natural Science Foundation of China
Ministerio de Economía y Competitividad
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)