Optical temperature sensing of NaYbF_4: Tm^3+ @ SiO_2 core-shell micro-particles induced by infrared excitation

Abstract

NaYbF(4):Tm3+@SiO(2) core-shell micro-particles were synthesized by a hydrothermal method and subsequent ultrasonic coating process. Optical temperature sensing has been observed in NaYbF4: Tm(3+)@SiO(2)core-shell micro-particles with a 980 nm infrared laser as excitation source.The fluorescence intensity ratios, optical temperature sensitivity, and temperature dependent population re-distribution ability from the thermally coupled (1)D(2)/(1)G(4) and (3)F(2) /(3)H(4) levels of the Tm(3+) ion have been analyzed as a function of temperature in the range of 100~700 K in order to check its availability as a optical temperature sensor. A better behavior as a lowtemperature sensor has been obtained with a minimum sensitivity of 5.4 × 10(-4) K(-1) at 430 K. It exhibits temperature induced population re-distribution from (1)D(2) /(1)G(4) thermally coupled levels at higher temperature range.

Effect of molybdenum on upconversion emission and temperature sensing properties in Na0.5Bi0.5TiO3:Er/Yb ceramics

“…(1) and the values of coefficient and energy gap were found to be $ 6.67 and 706.68 cm À 1 , respectively. For optical thermometry applications, the sensing sensitivity was estimated from the equation of S ¼ dR/dT ¼ R(ΔE 12 /kT 2 ) [23,24]. As shown in Fig.…”

Luminescent nano-thermometer based on up-conversion luminescence behavior of transparent Ba2ErF7 nano-glass ceramics

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Low-temperature thermometry based on upconversion emission of Ho/Yb-codoped Ba0.77Ca0.23TiO3 ceramics

“…Dong et al revealed that the optical temperature sensor, which was based on the UC emission of Er-Mo doped Yb 3 Al 5 O 12 , can be operated in the temperature range of 293-973 K with a maximum sensitivity of 0.0048 K À1 [11]. Noticeably, the optical temperature sensing studies are mainly focused on glasses and fluorides [12][13][14]. However, they have some drawbacks.…”