Design of white-emitting optical temperature sensor based on energy transfer in a Bi³⁺, Eu³⁺ and Tb³⁺ doped YBO₃ crystal

Abstract

Phosphors for remote optical determination have gained great attentions for its promising applications due to their advantage of the rapid and noninvasive detection compared to traditional thermometers. In this work,...

Designing bifunctional platforms for LED devices and luminescence lifetime thermometers: a case of non-rare-earth Mn4+ doped tantalate phosphors

“…As shown in Fig. 5(d), the maximum relative sensing sensitivity was found to be about 1.73% K −1 at 453 K, and it is excellent in comparison with some luminescent materials based on the TDL or LIR techniques, 40,[62][63][64][65][66][67][68][69][70][71][72][73][74] as summarized in Table 2.…”

Variation from Zero to Negative Thermal Quenching of Phosphor with Assistance of Defect States

“…The results indicate that the PL intensity first increases and then decreases with the increase of x, and reaches the maximum at x = 0.01, due to the concentration quenching effect. 43 Moreover, the PL spectra with temperature variations for KGGO/xBi 3+ (x = 0.005, 0.01, 0.015, 0.02, and 0.03) are shown in Figure S4, and Figure 2c displays the normalized PL intensity of KGGO/xBi 3+ as temperature increases. The results show that PL intensity of KGGO/0.01Bi 3+ maintains 100% of original intensity at 393 K under 325 nm excitation, which proves the satisfied thermal stability of KGGO/0.01 Bi 3+ .…”

“…Figure a shows the PL and PLE spectra of KGGO/0.01Bi 3+ . Under 325 nm excitation, the PL spectrum of KGGO/0.01Bi 3+ has two emission bands, ranging from 400 to 620 nm, which are attributed to 3 P 1 – 1 S 0 transition of Bi 3+ . − Figure b displays the relationship between the PL intensity and the Bi 3+ ion concentration, and the PL spectra are shown in Figure S3. The results indicate that the PL intensity first increases and then decreases with the increase of x , and reaches the maximum at x = 0.01, due to the concentration quenching effect .…”

“…Under 325 nm excitation, the PL spectrum of KGGO/0.01Bi 3+ has two emission bands, ranging from 400 to 620 nm, which are attributed to 3 P 1 – 1 S 0 transition of Bi 3+ . − Figure b displays the relationship between the PL intensity and the Bi 3+ ion concentration, and the PL spectra are shown in Figure S3. The results indicate that the PL intensity first increases and then decreases with the increase of x , and reaches the maximum at x = 0.01, due to the concentration quenching effect . Moreover, the PL spectra with temperature variations for KGGO/ x Bi 3+ ( x = 0.005, 0.01, 0.015, 0.02, and 0.03) are shown in Figure S4, and Figure c displays the normalized PL intensity of KGGO/ x Bi 3+ as temperature increases.…”

Demonstration of temperature-sensitive paints with rigorously controlled thickness applied to variously shaped metal substrates with a highly stable connection based on a demulsification-induced fast solidification strategy

“…1,2 Along these lines, the fabrication of noncontact thermometers based on luminescent temperature-sensitive materials has been proposed as a promising alternative due to their excellent spatial and temporal resolution properties, enhanced sensitivity, noninvasiveness, and simplicity, while they can also be competently used in various applications including remote detection, fast-moving objects, strong electromagnetic fields, corrosive environments, and biological fluids. 1–3,11–19 It is interesting to note that temperature-sensitive paints (TSPs) composed of both luminescent molecular probes and polymer matrices are widely employed for non-contact temperature measurements on solid surfaces, in the air of wind tunnel tests and in aerodynamics studies. In addition, there are reports in the literature regarding their implementation for carrying out droplet–substrate interface temperature and interfacial heat transfer measurements, as well as detection of the temperature distribution within gas–liquid two-phase flows based on the principle of temperature quenching, since they display the features of fast response and execution of contactless measurements.…”