Issue 33, 2023

Temperature invariant lifetime based luminescent manometer on Mn4+ ions

Abstract

Luminescent manometry enables remote pressure readout with unprecedented spatial and pressure resolution. The need to image pressure in a temperature-invariant manner imposes the search for new solutions that offer such capabilities. In this study, we present an approach that enables remote pressure sensing using the luminescence kinetics of Mn4+ ions in SrGdAlO4. The uniqueness of this solution is related to the pressure induced prolongation of the lifetime of the 2E level of Mn4+ ions resulting from a change in the covalency of the Mn4+–O2− bond. Taking the advantage of this effect, the luminescence decay time was increased from 1.44 ms to 2.14 ms when the pressure was changed from ambient to 7.6 GPa. This allowed the development of a luminescent manometer with a maximum relative sensitivity of 7.85%/GPa at 3 GPa and sensitivities above SR > 5%/GPa in the pressure range of 1–7.6 GPa. Moreover, in the temperature range of 260–365 K, the lifetime value was independent of temperature changes, enabling a temperature invariant manometric factor of 134.

Graphical abstract: Temperature invariant lifetime based luminescent manometer on Mn4+ ions

Supplementary files

Article information

Article type
Paper
Submitted
13 mar 2023
Accepted
24 iyl 2023
First published
26 iyl 2023

J. Mater. Chem. C, 2023,11, 11353-11360

Temperature invariant lifetime based luminescent manometer on Mn4+ ions

M. Pieprz, M. Runowski, P. Woźny, J. Xue and L. Marciniak, J. Mater. Chem. C, 2023, 11, 11353 DOI: 10.1039/D3TC00911D

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