Enhanced photoluminescence and ultrahigh temperature sensitivity from NaF flux assisted CaTiO3: Pr3+ red emitting phosphor

Tian, Xiuying; Lian, Shixun; Ji, Changyan; Zhi, Huang; Wen, Jin‐Kun; Chen, Zhanjun; Peng, Hongxia; Wang, Shumei; Li, Jing; Hu, Jilin; Peng, Yangxi

doi:10.1016/j.jallcom.2019.01.087

Cited by 56 publications

(7 citation statements)

References 55 publications

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“…However, the emission intensity of 1 D 2 – 3 H 4 (612 nm) was constant and the emission peak broadened with the increase in temperature, resulting in a blue shift and broadening in the range of 580–630 nm. Similar experimental phenomena also appeared in previous research. − ,,,,− As the temperature rises, the electrons in the 3 P 0 state relax to the 1 D 2 state by Pr 3+ –Ti 4+ IVCT, resulting in the changing of the relative population between 3 P 0 and 1 D 2 states. Consequently, the FIR between 3 P 0 and 1 D 2 transitions can be strongly controlled with temperature.…”

Section: Results and Discussionsupporting

confidence: 84%

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr³⁺/Dy³⁺ Energy Transfer

et al. 2020

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As increasing demand for noncontact temperature sensing, the development of a high-performance optical thermometer probe is more and more urgent. In this work, an efficient dual-mode optical thermometry strategy based on the Pr 3+ /Dy 3+ energy transfer (ET) in some typical double-perovskite oxides is presented, which offers a promising way to design FIR/lifetime dual-mode optical thermometry with excellent temperature-measuring sensitivity and signal discrimination. According to this strategy, double-perovskite La 2 MgTiO 6 :Pr 3+ /Dy 3+ phosphors are successfully synthesized. On the basis of diverse thermal responses between Pr 3+ and Dy 3+ , the FIR of Pr 3+ to Dy 3+ (four FIR mode) in this material displays outstanding optical thermometry performance from 298 to 548 K. The maximum absolute and relative sensitivities (S a and S r ) of mode 1 are 0.09 and 2.357% K −1 , being better than the current optical temperature measurement materials. For the fluorescence lifetime mode, the S a-max and S r-max values reach 2.85 × s 10 −4 and 1.814% K −1 . Furthermore, the dual-mode optical thermometry mechanism was presented and studied. It also demonstrated excellent optical thermometry performance in the other Pr 3+ /Dy 3+ codoped double-perovskite oxides, such as LaMg 0.598 Nb 0.402 O 3 , NaLa(MoO 4 ) 2 , NaGd(MoO 4 ) 2 , and NaLa(WO 4 ) 2 , proving the universality of the presented strategy. This article presents an effective Pr 3+ /Dy 3+ ET pathway for developing new and highly sensitive FIR/lifetime dual-mode optical temperature sensing materials.

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Section: Results and Discussionsupporting

confidence: 84%

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr³⁺/Dy³⁺ Energy Transfer

et al. 2020

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“…Thus, an important goal for Pr 3+ -doped oxide materials is to control the 3 P 0 → l D 2 radiationless transition and hence the relative intensities of the greenish-blue ( 3 P 0 → 3 H 4 ) and red ( 1 D 2 → 3 H 4 ) emissions via the IVCT state. Furthermore, the IVCT state of lanthanide-doped luminescence materials exhibits a great interest for not only fundamental studies but also technological applications, , particularly for optical temperature sensing − Up to now, the most typical technique previously reported for optical thermometry materials is the fluorescence intensity ratio (FIR), which is based on thermally coupled energy levels (TCELs) of lanthanide ions, such as Er 3+ , Tm 3+ , and Ho 3+ . FIR shows some advantages over others, particularly, it is intrinsically self-referenced and has negligible signal drift only because the FIR value is independent of excitation power and doping concentration.…”

Section: Introductionmentioning

confidence: 99%

Hole Trapping Process and Highly Sensitive Ratiometric Thermometry over a Wide Temperature Range in Pr³⁺-Doped Na₂La₂Ti₃O₁₀ Layered Perovskite Microcrystals

Wang

Цюмра

et al. 2019

J. Phys. Chem. A

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We demonstrate a potential optical thermometric material, Pr3+-doped triple-layered perovskite Na2La2Ti3O10 microcrystals, which promises a remarkable performance in temperature sensing over a wide temperature range (125–533 K), with a maximum relative sensitivity of 2.43% K–1 at 423 K. Both temperature and high-pressure dependent photoluminescence measurements were performed for this compound. It turns out that the Pr3+–Ti4+ intervalence charge transfer state is the primary cause for the very efficient thermometric characteristics in the 296–533 K range. In the 125–300 K range, 3P1 and 3P0 levels of Pr3+ can be exploited as thermally coupled energy levels for temperature sensing with high sensitivity at and below room temperature. A significant enhancement of the Pr3+ ions’ luminescence observed in the 4.5–300 K range is ascribed to an efficient, thermally activated energy transfer process from the host to Pr3+ ions. Carrier recombination on Pr3+ related hole traps was proposed in the studied system. The thermoluminescence properties are investigated, and possible mechanisms for the interpretation of the experimental results are discussed as well. This work may provide a perspective approach to design a high-performance, self-calibrated optical thermometer operating over a wide temperature range.

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“…These impurity levels can be combined with excited electrons to become hole traps to generate fluorescence, and thus improve the luminosity intensity. The replacement of O 2− with a certain amount of F − ions could improve the energy transfer efficiency from the GOS host material to Tb 3+ , and contribute to the resulting Tb 3+ fluorescent transition [ 35 , 36 ]. However, with the increase in the amount of F − ions, new intrinsic defects will be formed, which will lead to a reduction in the energy transfer efficiency and emission intensity [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

High Quantum Efficiency Rare-Earth-Doped Gd2O2S:Tb, F Scintillators for Cold Neutron Imaging

et al. 2023

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High-resolution neutron radiography provides novel and stirring opportunities to investigate the structures of light elements encased by heavy elements. For this study, a series of Gd2O2S:Tb, F particles were prepared using a high-temperature solid phase method and then used as a scintillation screen. Upon reaching 293 nm excitation, a bright green emission originated from the Tb3+ luminescence center. The level of F doping affected the fluorescence intensity. When the F doping level was 8 mol%, the fluorescence intensity was at its highest. The absolute quantum yield of the synthesized particles reached as high as 77.21%. Gd2O2S:Tb, F particles were applied to the scintillation screen, showing a resolution on the neutron radiograph as high as 12 μm. These results suggest that the highly efficient Gd2O2S:Tb, F particles are promising scintillators for the purposes of cold neutron radiography.

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Enhanced photoluminescence and ultrahigh temperature sensitivity from NaF flux assisted CaTiO3: Pr3+ red emitting phosphor

Cited by 56 publications

References 55 publications

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr³⁺/Dy³⁺ Energy Transfer

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr³⁺/Dy³⁺ Energy Transfer

Hole Trapping Process and Highly Sensitive Ratiometric Thermometry over a Wide Temperature Range in Pr³⁺-Doped Na₂La₂Ti₃O₁₀ Layered Perovskite Microcrystals

High Quantum Efficiency Rare-Earth-Doped Gd2O2S:Tb, F Scintillators for Cold Neutron Imaging

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Enhanced photoluminescence and ultrahigh temperature sensitivity from NaF flux assisted CaTiO3: Pr3+ red emitting phosphor

Cited by 56 publications

References 55 publications

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr3+/Dy3+ Energy Transfer

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr3+/Dy3+ Energy Transfer

Hole Trapping Process and Highly Sensitive Ratiometric Thermometry over a Wide Temperature Range in Pr3+-Doped Na2La2Ti3O10 Layered Perovskite Microcrystals

High Quantum Efficiency Rare-Earth-Doped Gd2O2S:Tb, F Scintillators for Cold Neutron Imaging

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Resources

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Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr³⁺/Dy³⁺ Energy Transfer

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr³⁺/Dy³⁺ Energy Transfer

Hole Trapping Process and Highly Sensitive Ratiometric Thermometry over a Wide Temperature Range in Pr³⁺-Doped Na₂La₂Ti₃O₁₀ Layered Perovskite Microcrystals