Strong sensitivity enhancement in lifetime-based luminescence thermometry by co-doping of SrTiO₃:Mn⁴⁺ nanocrystals with trivalent lanthanide ions

Abstract

The co-doping of SrTiO3:Mn4+ luminescent nanocrystals by trivalent lanthanide ions (Ln3+ = Lu3+, Tm3+, Er3+, Ho3+, Dy3+, Eu3+, La3+) is demonstrated as a new strategy for the significant sensitivity improvement...

Thermally boosted upconversion and downshifting luminescence in Sc2(MoO4)3:Yb/Er with two-dimensional negative thermal expansion

“…Previously, Sc 2 (MoO 4 ) 3 :Yb/Ho with the same host was used as a ratiometric thermometer based on the UC red-to-green emission intensity ratio 10 . Note that LLT is of special importance owing to several attractive merits over conventional intensity-based thermometry 42 – 46 . For instance, PL lifetime is insensitivity to the variation in phosphors concentration and excitation intensity, which enables LLT to circumvent the measurement error that is intrinsic and inevitable for intensity-based thermometry.…”

Resonance/off-resonance excitations: implications on the thermal evolution of Eu3+ photoluminescence

“…where T presents the absolute temperature. A, B, and C are shows the temperature dependence of S r values derived from eqn (18). S r varies between 0 to 4.9% K À1 showing the maximum value at 83 K. The reported sensitivity value is much higher than most conventional Ln-based phosphor thermometers (Table 1).…”

“…2,[14][15][16] Compared to the conventional techniques of temperature measurement, luminescence thermometry offers the advantages of a remote mode of temperature detection on a small length scale (like temperature monitoring of different regions of electronic circuits), fast-moving objects, compactness, and independence of the environment (such as stray electromagnetic fields) around the object. Among the various temperature-induced changes in the photoluminescence parameters: intensity of the transition, 17 emission lifetime, 18,19 transition bandwidth, 20 and spectral shifting, 21 the luminescence intensity ratio (LIR) is the most popular. In the simplest case, the LIR can be obtained from transitions from thermally coupled emission levels (TCLs).…”

“…Fig.7(a) Temperature dependence of the luminescence intensity ratio (LIR) of CT:0.5Er 3+ 0.5Eu 3+ from 20 to 300 K considering the integrated intensity of Eu 3+ 5 D 0 -7 F 2 and Er 3+ 4 S 3/2 -4 I 15/2 emissions. The line represents a fit to the data using eqn(18). (b) Temperature dependence of the relative thermal sensitivity (S r ).…”

Antithermal Quenching and Multiparametric Temperature Sensing from Mn2+/Tb3+‐Codoped Ca2LaTaO6 Phosphor

“…Both methods are selfreferencing; thus, they can circumvent the adverse effects caused by fluctuations in excitation and electromagnetic compatibility. [17,18] Compared with the lifetime mode, the LIR mode requires less complexity and cost in the instrument composition for temperature detection, but the accuracy of the measurement is poor. [19] Therefore, the shortcoming has inspired researchers to exploit new methods and materials to achieve a more accurate temperature-sensing ability.…”