Sensitivity improvement induced by thermal response behavior for temperature sensing applications

Abstract

Er3+-doped UC materials with high sensitivity show potential applications in industrial manufacture, science and technology and real life.

Core–Shell NaYF4:Yb3+/Tm3+@NaGdF4:Ce3+/Eu3+ Nanoparticles for Upconversion and Downconversion Dual-Mode Fluorescence-Based Temperature Sensing

“…The formulas for sensitivity and temperature resolution ,− were used, in which S a , S r , and δ T are the absolute sensitivity, relative sensitivity, and temperature resolution, respectively. Δ E is the energy-level difference between the two energy levels, T is the Kelvin temperature, and k is the Boltzmann constant.…”

An Er3+ doped Ba2MgWO6 double perovskite: a phosphor for low-temperature thermometry

“…[32][33][34][35][36] The usefulness of Er 3+ /Yb 3+ doped YAG nanoparticles in luminescence thermometry has recently been presented. 37 Several double-perovskite hosts were studied with Er 3+ , among which NaLaMgWO 6 , 38 LiLaMgWO 6 , 39 Ba 2 CaWO 6 , 40 Gd 2 ZnTiO 6 , 41 and Ba 2 LaNbO 6 42 were studied for application in luminescence thermometry. Most of them reported relative sensitivities ranging from 0.9% K −1 to 1.5% K −1 , which is sufficiently high to justify interest in this family of materials.…”

Deep-Tissue Temperature Sensing Realized in BaY2O4:Yb3+/Er3+ with Ultrahigh Sensitivity and Extremely Intense Red Upconversion Luminescence

“…Particularly, the FIR thermometry based on trivalent lanthanide ions doped upconversion (UC) phosphors have received extensive interest because of the potential application as a temperature sensor in vivo . − Typically, in order to achieve efficient UC emission and accurate temperature measurement, erbium ion Er 3+ with abundant ladder-like arranged energy levels, is often selected as the activator along with Yb 3+ as the sensitizer due to its large absorption cross section around 980 nm and efficient energy transfer (ET) to Er 3+ . − As a result, Er 3+ could usually generate intense green UC emission derived from 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 transitions under the excitation of 980 nm wavelength. Subsequently, the optical temperature sensing can be realized based on the FIR between the thermally coupled levels (TCLs) 2 H 11/2 and 4 S 3/2 . , However, its practical application is greatly limited by the strong absorption for green light in the biological tissues.…”