Implementing Defects for Ratiometric Luminescence Thermometry

Abstract

<jats:p>In luminescence thermometry enabling temperature reading at a distance, an important challenge is to propose new solutions that open measuring and material possibilities. Responding to these needs, in the nanocrystalline phosphors of yttrium oxide Y2O3 and lutetium oxide Lu2O3, temperature-dependent emission of trivalent terbium Tb3+ dopant ions was recorded at the excitation wavelength 266 nm. The signal of intensity decreasing with temperature was monitored in the range corresponding to the 5D4 → 7F6 emission band. On the other hand, defect emission intensity obtained upon 543 nm excitation increases significantly at elevated temperatures. The opposite thermal monotonicity of these two signals in the same spectral range enabled development of the single band ratiometric luminescent thermometer of as high a relative sensitivity as 4.92%/°C and 2%/°C for Y2O3:Tb3+ and Lu2O3:Tb3+ nanocrystals, respectively. This study presents the first report on luminescent thermometry using defect emission in inorganic phosphors.</jats:p>

Synthesis and luminescence spectroscopy study of a novel orange‐red colour emissions phosphor based on Tb3+ ion‐doped Na2ZnP2O7

“…[ 44 ] In another study on Tb 3+ ‐doped Ln 2 O 3 (Ln = Y, Lu) sesquioxides, Drabik et al . [ 45 ] observed that, for a 10‐fold increase in Tb 3+ concentration, shortening of average lifetimes reached only 4–7% of the initial value obtained for the lowest dopant concentration. Shortening of lifetime is usually observed as Tb 3+ concentration increases.…”

Self-reduction-induced BaMgP2O7:Eu2+/3+: a multi-stimuli-responsive phosphor for X-ray detection, anti-counterfeiting and optical thermometry

“…18,43 The discrepancy of the thermally responsive emission intensity variation between Eu 2+ and Eu 3+ qualifies the BMPO: Eu phosphors with potential application for ratiometric optical thermometry. 44 The FIR of Eu 2+ at 410 nm on Eu 3+ at 596, 619, and 699 nm was calculated, respectively, as the temperature measurement index. As depicted in Fig.…”

Advances in Reversible Luminescence Modification and Applications of Inorganic Phosphors Based on Chromism Reaction

“…[ 8 ] Moreover, the energy transfer process could happen between the traps and chromophores, so it is possible to achieve luminescence enhancement of the emitter by controlling the species of defects. [ 9 ] In terms of inorganic luminescence materials within the nanoscale, surface engineering techniques such as surface plasmonic resonance [ 10 ] , core–shell structure, [ 11 ] and dye‐sensitizing [ 12 ] are effective ways to enhance the brightness of nanoparticles. Despite some progress, the abovementioned luminescence modulation approaches are irreversible, severely restricting the broader application of inorganic luminescent materials.…”

“…Copyright 2022, American Chemical Society. Reproduced with permission [9]. Reproduced with permission [14].…”