Dual-mode optical thermometers based on YNbO4:Bi3+,Sm3+ phosphors

Regulating Luminescence Thermal Quenching of Praseodymium-Doped Niobo-Tantalate Phosphor through Intervalence Charge Transfer Band Displacement

“…Figure S6b depicts that the trend of monotonically increasing chromaticity coordinates x and monotonically decreasing y , which can be used as a high-quality red fluorescent material . Meanwhile, the compensation of the 3 P 0 emission to the 1 D 2 emission during the warming process leads to the exact opposite thermal quenching process of the two emission peaks, as shown in Figure S7, which is expected to be of great application in the field of temperature sensing. , The FIR method for LiTaO 3 :0.005Pr 3+ phosphor is described by the Strike and Fongers equation, which is expressed as follows FIR .25em ( I 612 − 624 nm / I 507 − 517 nm ) = I 0,612 − 624 nm I 0,507 − 517 nm 1 + A 612 − 624 .25em nm × exp nobreak0em0.25em⁡ ( − E 612 − 624 nm / K normalB T ) 1 + A 507 − 517 .25em nm × exp nobreak0em0.25em⁡ ( − E 612 − 624 nm / K normalB T ) FIR .25em ( I 612 − 624 nm / I 507 − <...…”

“…Figure S6b depicts that the trend of monotonically increasing chromaticity coordinates x and monotonically decreasing y , which can be used as a high-quality red fluorescent material . Meanwhile, the compensation of the 3 P 0 emission to the 1 D 2 emission during the warming process leads to the exact opposite thermal quenching process of the two emission peaks, as shown in Figure S7, which is expected to be of great application in the field of temperature sensing. , The FIR method for LiTaO 3 :0.005Pr 3+ phosphor is described by the Strike and Fongers equation, which is expressed as follows where the constants B , C , and Δ E T are the parameters associated with I 0 , A , and E for the Pr 3+ 612–624 nm 1 D 2 → 3 H 4 emission and the 507–517 nm 3 P 0 → 3 H 4 emission. Figure S6c shows that the exponential fitting of FIR and 1/ T is well.…”

“…43 Meanwhile, the compensation of the 3 P 0 emission to the 1 D 2 emission during the warming process leads to the exact opposite thermal quenching process of the two emission peaks, as shown in Figure S7, which is expected to be of great application in the field of temperature sensing. 44,45 The FIR method for LiTaO 3 :0.005Pr 3+ phosphor is described by the Strike and Fongers equation, 46 which is expressed as follows…”

Impact of ligand environment on optical, luminescence and thermometric behavior of A3(PO4)2:Sm3+ (A = Ca, Sr) phosphors

“…Additionally, the temperature resolution (δ T ) serves as a crucial parameter for evaluating the accuracy of the designed sample. It can be calculated using the following formula [46]: where δ FIR /FIR corresponds to the relative error in the measurement of the thermometric parameter. Figure 15a,b shows the variation of δ T as a function of temperature ( T ) for FIR( I 530 / I 595 ) and FIR( I 530 / I 640 ).…”

Multicolor tunable Bi3+,Sm3+ co-doped Sr2GdGaO5 phosphor and its application in optical thermometry

“…Consequently, dual-emission centers based on Bi 3+ and Sm 3+ with different temperature-dependent luminescence have been proposed in optical thermometry sensing, which is primarily dependent on achieving a distinguishable emission peak between Bi 3+ and Sm 3+ ions and their energy-transfer (ET) characteristic. 33,34 Here, Bi 3+ functions as an activator, inducing intense blue emission, which also sensitizes Sm 3+ ions to emit orange-red light in the Bi 3+ ,Sm 3+ co-doped materials. Importantly, their emission positions are distinctly apart, facilitating accurate signal differentiation.…”