Highly Sensitive Lifetime‐Based Luminescent Manometer on Mn4+ Luminescence in Sr4Al14O25 Mn4+

Abstract Enabling remote and temperature‐independent pressure sensing based on luminescence kinetics holds significant potential for the development of a luminescence pressure sensor with a wide array of applications. To meet these requirements, in this work, a unique lifetime‐based luminescence manometer is demonstrated for which an increase in pressure results in an elongation of lifetime of 2 E state of Mn 4+ due to a change in the probability of radiative depopulation of the 2 E level of Mn 4+ ions with an unprecedentedly high sensitivity of 35% GPa −1 . Furthermore, the pressure‐induced modification in the covalency of the Mn 4+ ─O 2− bond facilitates a manometer operating in spectral band shift and ratiometric modes with sensitivities of 26 cm −1 GPa −1 (1.2 nm GPa −1 ) and 24.8% GPa −1 , respectively. This study firmly supports the belief that the distinct pressure‐dependent kinetics governing the depopulation of Mn 4+ ions at the 2 E level, along with the resulting advantageous manometric performance, will pave the way for a new research trajectory in luminescence manometry.