Negative lattice expansion-induced upconversion luminescence thermal enhancement in novel Na₂MoO₄:Yb³⁺, Er³⁺ transparent glass ceramics for temperature sensing applications

Abstract

Negative lattice expansion induced upconversion luminescence thermal enhancement is an efficient way to solve the problems of thermal quenching of lanthanides ions, which could be combined with traditional fluorescence intensity...

Ultralow pressure sensing and luminescence thermometry based on the emissions of Er3+/Yb3+ codoped Y2Mo4O15 phosphors

“…[29][30][31] In contrast, molybdates with their features, such as a suitable sintering temperature, good physical and chemical stability, and low phonon energy have gained considerable interest recently. 32,33 To the best of our knowledge, this is the first report of the use of inorganic molybdate phosphors for vacuum and temperature sensors. In this work, Er 3+ /Yb 3+ -codoped YMO microparticles were synthesized using the sol-gel method.…”

“…29–31 In contrast, molybdates with their features, such as a suitable sintering temperature, good physical and chemical stability, and low phonon energy have gained considerable interest recently. 32,33…”

Temperature and Pressure Sensing Using an Optical Platform Based on Upconversion Luminescence in NaSrY(MoO4)3 Codoped with Er3+ and Yb3+ Nanophosphors

“…Since the materials based on the complex molybdate structure have high thermal conductivity, excellent thermal and mechanical energy, lower phonon energy (900 cm –1 ), high melting temperature (940 °C), and chemical stabilities, they are considered as promising host matrices for rare earth doping and optical temperature and pressure detection. − As previously reported, the use of lanthanide-doped nanocrystals for noninvasive temperature sensing was greatly advanced in the past decade. It is well known that UC materials containing Er 3+ and Yb 3+ ions can be utilized to noninvasively measure the temperature of their environment or the medium in which the given nanoparticles are situated. − Researchers from many different groups have been working on crystals development that could be used as high-sensitivity and effective optical thermometry. , Another application of sensors involves using UC materials in pressure sensing, based on pressure/temperature-dependent luminescence of lanthanide-doped materials with anti-Stokes emission under vacuum condition. , However, the literature data are very limited in this field. , In general, the majority of research dealing with optical sensors focuses on energy transitions, line-broadening and line-shifting processes, or the impact of high pressure on the crystal field. , …”

Huge Thermal Enhancement of Surface-Dominant Quasi-2D Upconversion Nanoflakes

“…21 Zi et al reported a Na 2 MoO 4 :Yb 3+ /Er 3+ nanoparticle with negative expansion coefficients (∼10 −5 Å/K −1 ) in the c-axis orientation. 22 As the temperature increases from 313 to 573 K, the distance between Yb 3+ and Er 3+ ions is thus shortened effectively, leading to high energy-transfer efficiency in Na 2 MoO 4 :Yb 3+ /Er 3+ nanoparticles. As a result, a 4.17-fold UC thermal enhancement of the 806/860 nm peak was achieved.…”

“…proved that the negative thermal expansion of the Zn 3 Mo 2 O 9 :Yb 3+ /RE 3+ (RE = Er/Ho) host prompted thermal enhancement by improving the efficiency of energy transfer between the sensitizer and the activator . Zi et al reported a Na 2 MoO 4 :Yb 3+ /Er 3+ nanoparticle with negative expansion coefficients (∼10 –5 Å/K –1 ) in the c-axis orientation . As the temperature increases from 313 to 573 K, the distance between Yb 3+ and Er 3+ ions is thus shortened effectively, leading to high energy-transfer efficiency in Na 2 MoO 4 :Yb 3+ /Er 3+ nanoparticles.…”