Cooling in Er 3+ :BaMoO 4 phosphor on codoping with Yb 3+ for elevated temperature sensing

Upconverting temperature sensors with high activation energy and low pump threshold

“…The obtained value of Δ E can be used to find the relative and absolute sensitivity of the phosphors, i.e. , the ability to sense every change in UC emission upon a minute change in temperature can be estimated by the expression, 52 …”

Strategies for designing low thermal quenching upconverting temperature sensors

“…, how often a sensor can detect even the smallest temperature changes. The relative ( S r ) and absolute ( S a ) sensitivities can be estimated by the following expressions 21,42 …”

Near-Infrared- and Magnetic-Field-Responsive NaYF4:Er3+/Yb3+@SiO2@AuNP@Fe3O4 Nanocomposites for Hyperthermia Applications Induced by Fluorescence Resonance Energy Transfer and Surface Plasmon Absorption

“…Under NIR light excitation, a portion of absorbed energy can be transformed into internal heat through nonradiative networks or cross-relaxation in the UCNP@SiO 2 . There are some reports available stating that in certain materials the FIR technique is not applicable in the intensity ratio investigation. , The UC emission spectra under various laser power excitations (316 to 1550 mW) for synthesized UCNP@SiO 2 have been discussed (Figure b). The FIR ( I 525 / I 550 ) values at various laser pump powers have been calculated and plotted in Figure a.…”