Energy transfer-triggered multicolor emissions in Tb³⁺/Eu³⁺-coactivated Y₂Mo₃O₁₂ negative thermal expansion microparticles for dual-channel tunable luminescent thermometers

Abstract

Rational control of thermal quenching performance is crucial for achieving high quality luminescent thermometer. Herein, we report the Tb3+/Yb3+-coactivated Y2Mo3O12 (YMO) negative thermal expansion (NTE) microparticles with color-tunable emissions. Irradiated...

Simultaneously tuning the luminescent color and realizing an optical temperature sensor by negative thermal expansion in Sc2(WO4)3:Tb/Eu phosphors

“…Specifically, the optimal relative sensitivity of the SWO:25%Tb/3%Eu phosphor is 9 times that of the Y 2 (MoO 4 ) 3 :Tb 3+ /Eu 3+ phosphor with NTE properties and 5 times that of the Gd 2 (MoO 4 ) 3 :Tb 3+ /Eu 3+ phosphor with PTE properties. 48,49…”

“…Specifically, the optimal relative sensitivity of the SWO:25%Tb/ 3%Eu phosphor is 9 times that of the Y 2 (MoO 4 ) 3 :Tb 3+ /Eu 3+ phosphor with NTE properties and 5 times that of the Gd 2 (MoO 4 ) 3 :Tb 3+ /Eu 3+ phosphor with PTE properties. 48,49 Besides the sensitivities mentioned above, good stability and reversibility are also crucial evaluation parameters to meet the requirement of practical applications. Herein, five cycles of heating and cooling were conducted on the SWO:25%Tb/3% Eu phosphor.…”

Effects of activated Sr 2+ ion content on strong blue‐emitting Ca 2 Sb 2 O 7 materials for high‐quality WLED devices

“…The decay curves were well indexed to the single‐exponential decay model () with high fitting degree (R 2 ) as shown in Figure 4G‐L and Table S5; and then, the lifetimes of the Ca 2 Sb 2 O 7 , Ca 1.6 Sr 0.4 Sb 2 O 7 , Ca 1.2 Sr 0.8 Sb 2 O 7 , Ca 0.8 Sr 1.2 Sb 2 O 7 , Ca 0.4 Sr 1.6 Sb 2 O 7 , and Sr 2 Sb 2 O 7 phosphors were estimated to be about 285.05 ns, 343.69 ns, 289.29 ns, 260.54 ns, 260.66 ns, and 272.88 ns, respectively. Clearly, the lifetime of the self‐host emitting materials would be smaller than those of the luminescent activators‐doped phosphors (eg, Ca 8 ZnLa(PO 4 ) 7 :Tm 3+ /Dy 3+ (19.64 μs), 44 Y 2 Mo 3 O 12 :Tb 3+ /Eu 3+ (870.7 μs), 45 and NaCa 3 Bi(PO 4 ) 3 F:Sm 3+ (1.198 ms) phosphors) 46 . Besides, the QY values of the Ca 2 Sb 2 O 7 , Ca 1.6 Sr 0.4 Sb 2 O 7 , Ca 1.2 Sr 0.8 Sb 2 O 7 , Ca 0.8 Sr 1.2 Sb 2 O 7 , Ca 0.4 Sr 1.6 Sb 2 O 7 , and Sr 2 Sb 2 O 7 phosphors were measured to be 60.04%, 49.94%, 37.68%, 27.20%, 16.38%, and 20.52%, respectively, as shown in Figure S11(a‐f).…”

Negative Thermal Expansion Materials as Anti-Thermal-Quenching Phosphor Matrixes: Status, Opportunities, and Challenges

“…Also in 2021, Du et al demonstrated NTE-induced ET enhancement between Tb 3+ and Eu 3+ from the NTE-based Y 2 Mo 3 O 12 :Tb 3+ ,Eu 3+ phosphor over the temperature range of 163−363 K, which enables this material with diverse anti-TQ performances from different emission bands. 36 In the same report on NTE-induced anti-TQ UC emission published in late 2021, which was discussed above, Zhou et al also studied the temperature-dependent DS emission intensity from their NTE-based ZrW 2 O 8 :Eu 3+ phosphor. 19 When they increased their measurement temperature from room temperature to 373 K, they observed the DS PL intensity enhanced to 130%.…”

“…Also in 2021, Du et al demonstrated NTE-induced ET enhancement between Tb 3+ and Eu 3+ from the NTE-based Y 2 Mo 3 O 12 :Tb 3+ ,Eu 3+ phosphor over the temperature range of 163–363 K, which enables this material with diverse anti-TQ performances from different emission bands …”