an0c00403_si_001.pdf (785.11 kB)
Combined Temperature and Pressure Sensing Using Luminescent NaBiF4:Yb,Er Nanoparticles
journal contribution
posted on 2020-04-21, 19:22 authored by Magda
A. Antoniak, Szymon J. Zelewski, Robert Oliva, Andrzej Żak, Robert Kudrawiec, Marcin NykThe
room temperature synthesis and photoluminescence properties
of hexagonal phase NaBiF4 nanocrystals doped with lanthanide
ions have been presented. An efficient infrared Stokes emission and
upconverted photoluminescence from the rare-earth ions (Yb3+, Er3+) codoped into bismuth–fluoride nanomatrix
allows for dual modality of temperature and pressure sensing in VIS
and NIR spectral regions. Upconversion emission shows nearly quadratic
dependence of the photoluminescence intensity on the excitation light
power, confirming a two-photon induced process and allowing two-photon
sensing by nanocrystals with low-power CW laser diodes. The determined
temperature sensitivity in the visible range varied from 1.07%/K at
303 K down to the minimum value of 0.27%/K at 523 K. Both Stokes and
anti-Stokes emission bands are affected by matrix compression, with
the determined emission wavelength pressure coefficients for the NIR
range lines exceeding that of ruby. These novel nanocrystals combine
the simplified green chemistry synthesis approach and features of
lanthanide ions, providing a unique platform for many nanophotonics
and sensing applications.