Temperature and concentration effects on upconversion photoluminescence properties of Ho3+ and Yb3+ codoped 0.67Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 multifunctional ceramics

Investigation of SrB4O7:Sm2+ as a Multimode Temperature Sensor with High Sensitivity

“…The relative sensitivity of the FIR method usually decreases as temperature increases. However, the sensitivity of the SrB 4 O 7 :5% Sm 2+ sample was 3.36%·K –1 at 550 K and was almost constant after 490 K, which is very high compared to those reported for FIR. − Compared with recent studies applying the decay lifetime method, − the prepared sample has higher sensitivity and a wider temperature sensing range. This constant high sensitivity makes it very effective and accurate for temperature sensing.…”

“…Rare-earth-ion-doped materials have drawn great attention as noncontact optical temperature sensors that are able to operate in environments where traditional thermometers are not feasible, such as in the tissue of living organisms − and submicrometer temperature sensing. The temperature dependence of the decay lifetime − and the fluorescence intensity ratio (FIR) − are the two main mechanisms for fluorescent thermometry and have the merits of rapid response, high sensitivity, and spatial resolution.…”

Spectral Investigation of Yb3+/Ho3+/Tm3+:Y2Si2O7 Upconverting Nanophosphors for the Usage of Temperature Sensing

“…The optical thermometer properties of RE 3+ : Yb 3+ /Ho 3+ doped phosphors are limited to a few studies. For example, the sensor sensitivities are 0.0053 K -1 at 93 K for Yb 3+ /Ho 3+ :BaCaTiO3, 0.0077 K -1 at 366 K for Yb 3+ /Ho 3+ : Pb(MgNb)O3PbTiO3, and 0.005 K -1 at 923 K for Yb 3+ /Ho 3+ : CaWO4, respectively (11)(12)(13).The primary goal in the field of optical thermometry is to manufacture the sensor with the highest sensitivity. Therefore, the selection of suitable host materials for the high solubility of RE ions may provide a significant advantage in luminescence properties for the development of optical temperature sensing.…”

Upconversion red light emission and luminescence thermometry of Gd2O3:Er3+ @Gd2O3:Yb3+ core-shell nanofibers synthesized via electrospinning

“…However, with continued developing of modern industry, these traditional themometers encounter plenty of challenges included hazardous working environment, biological environment, wide temperature range, motion with high speed, micro-nano scale. Luminescence thermometry based on spectral parameters such as emission intensity, bandshape, position of emission bands, spectral width and luminescence lifetime of nanophosphors has attracted many attentions due to the advantages of high spatial resolution, rapid response and non-invasiveness, which may show great potential in microelectronics and precise medical measurement [1][2][3][4][5]. Therefore, it is of great importance to develop nanophosphors for temperature sensing applications.…”