Excitation-wavelength-dependent anti-thermal quenching of upconversion luminescence in hexagonal NaGdF4:Nd3+/Yb3+/Er3+ nanocrystals

Pang, Tao; Wu, Yanling; Zhang, Yujian; Jian, Ronghua; Mao, Junwen; Wang, Hong; Guo, Hai

doi:10.1039/d2tc00263a

Cited by 18 publications

(4 citation statements)

References 35 publications

(45 reference statements)

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“…As a part of Y 3+ ions are replaced by Lu 3+ ions, the local structural distortion is generated and could induce intense CR between Er 3+ and Yb 3+ . The local structure distortion may also cause a change in the radiative transition probabilities of 2 H 11/2 / 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions. , Hence, the ratios of red-to-green are strongly affected by local structural distortion.…”

Section: Resultsmentioning

confidence: 99%

Up-Conversion Luminescence and Temperature Sensing of Er³⁺/Yb³⁺ Codoped Y_2(1–x %)Lu_2x %O₃ Solid Solution

Hao

Zhu

2023

ACS Omega

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In this paper, Er 3+ /Yb 3+ codoped Y 2(1−x%) Lu 2x % O 3 solid solution was prepared through the sol−gel method, and the substitution of Y 3+ by Lu 3+ ions in Y 2 O 3 was confirmed by X-ray diffraction data. The upconversion emissions of samples under 980 nm excitation and the relative upconversion processes are investigated. The emission shapes do not vary with the change in doping concentration due to the unaltered cubic phase. The redto-green ratio changes from 2.7 to 7.8 and then declines to 4.4 as the doping concentration of Lu 3+ increases from 0 to 100. The emission lifetimes of green and red have similar variation: the emission lifetime decreases with doping concentration changing from 0 to 60 and rises as the doping concentration continues to increase. The reason why the emission ratio and lifetime change could be originated to the exacerbation of cross-relaxing process and the change of radiative transition probabilities. The temperature-dependent fluorescence intensity ratio (FIR) shows that all samples can be used in noncontact optical temperature sensing, and the method of local structure distortion can be used to improve sensitivity further. The max sensing sensitivities of FIR based on R 538/563 and R red/green reach 0.011 K −1 (483 K) and 0.21 K −1 (300 K). The results display that Er 3+ /Yb 3+ codoped Y 2(1−x %) Lu 2x % O 3 solid solution can be potential candidates for optical temperature sensing in different temperature ranges.

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Section: Resultsmentioning

confidence: 99%

Up-Conversion Luminescence and Temperature Sensing of Er³⁺/Yb³⁺ Codoped Y_2(1–x %)Lu_2x %O₃ Solid Solution

Hao

Zhu

2023

ACS Omega

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“…Upconverting compounds, where the rare-earth ions are employed as an activator and a sensitizer, have been widely concerned, since they have the capacity of changing the long-wavelength irradiation light into diverse short-wavelength emissions. Especially, Yb 3+ is used as a sensitizer owing to its intense absorption in near-infrared (NIR) light, while Nd 3+ , Ho 3+ , Er 3+ , Tm 3+ , etc., are selected as activators. − To develop novel upconverting materials, different types of hosts including fluoride, oxide, molybdate, silicate, etc., − have been employed. Unfortunately, the majority of designed rare-earth-ion-doped upconverting materials suffered from quenched upconversion (UC) emission intensities at high temperatures triggered by the thermal quenching effect, which astricts their feasibility in high-temperature monitoring.…”

Section: Introductionmentioning

confidence: 99%

Thermochromic Upconversion Emission in Tm³⁺/Yb³⁺-Codoped La₂Mo₃O₁₂ Microparticles via Negative Thermal Expansion Engineering for Ultrahigh Sensitivity Optical Thermometry

Luo

et al. 2023

J. Phys. Chem. C

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To develop high-sensitivity optical thermometers, Yb3+/Tm3+-codoped La2Mo3O12 microparticles were synthesized by the sol–gel method. With the aid of in situ X-ray diffraction, the resultant microparticles are verified to possess negative thermal expansion (NTE) properties. When excited at 980 nm, the upconversion (UC) emission properties of final products are investigated, in which their strongest fluorescence intensities are reached at x = 0.07. Due to the coexistence of the increased energy transfer, cross-relaxation, and nonradiative relaxation procedures, the as-prepared microparticles present thermochromic UC emissions. Moreover, the intensity of UC emission arising from the 3F2,3 excited level at 583 K is 21 times higher than its starting value at 303 K, resulting in thermally enhanced luminescence in resultant microparticles. By employing the fluorescence intensity ratio technique to investigate the temperature-related intensities of UC emissions from 1G4 and 3F2,3 levels, the thermometric characterization of designed compounds is explored, where its highest absolute and relative sensitivities are 0.44 K–1 and 7.37% K–1, respectively. Furthermore, according to the temperature-related lifetimes of 1G4 and 3F2,3 levels of Tm3+, the relative sensitivities of developed microparticles are 0.36% and 0.23% K–1, respectively. Ultimately, visual optical thermometry is also realized by the studied samples owing to their thermochromic UC emissions. Our findings propose a facile strategy by employing NTE to regulate the UC emission behaviors of rare-earth ions so as to obtain high-sensitive luminescent materials.

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“…Upconversion luminescence (UCL), consisting of multi-emission bands in the visible region, thanks to the characteristic response of each one to the external conditions, is especially suitable for developing luminescence-based dynamic anticounterfeiting. [1][2][3][4][5] However, temperature-and pressure-dependent UCL behaviors that have been widely reported do not meet the requirements of a convenient application. In contrast, power-responsive UCL color regulation (PUCR) shows greater applicability due to more straightforward usage.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive response of luminescence chromaticity to laser power in Lu₂Mo₄O₁₅:Yb³⁺/Ho³⁺ upconverting materials

Zhou,

Zhu,

Chen

et al. 2023

Dalton Trans.

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Excitation-wavelength-dependent anti-thermal quenching of upconversion luminescence in hexagonal NaGdF₄:Nd³⁺/Yb³⁺/Er³⁺ nanocrystals

Abstract: Many efforts have been focused on the thermal-enhanced upconversion (UC) luminescence, but it is still a challenge to maintain or even enhance the UC luminescence of NaLnF4-based phosphors (Ln =...

Cited by 18 publications

References 35 publications

Up-Conversion Luminescence and Temperature Sensing of Er³⁺/Yb³⁺ Codoped Y_2(1–x %)Lu_2x %O₃ Solid Solution

Up-Conversion Luminescence and Temperature Sensing of Er³⁺/Yb³⁺ Codoped Y_2(1–x %)Lu_2x %O₃ Solid Solution

Thermochromic Upconversion Emission in Tm³⁺/Yb³⁺-Codoped La₂Mo₃O₁₂ Microparticles via Negative Thermal Expansion Engineering for Ultrahigh Sensitivity Optical Thermometry

Highly sensitive response of luminescence chromaticity to laser power in Lu₂Mo₄O₁₅:Yb³⁺/Ho³⁺ upconverting materials

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Excitation-wavelength-dependent anti-thermal quenching of upconversion luminescence in hexagonal NaGdF4:Nd3+/Yb3+/Er3+ nanocrystals

Abstract: Many efforts have been focused on the thermal-enhanced upconversion (UC) luminescence, but it is still a challenge to maintain or even enhance the UC luminescence of NaLnF4-based phosphors (Ln =...

Cited by 18 publications

References 35 publications

Up-Conversion Luminescence and Temperature Sensing of Er3+/Yb3+ Codoped Y2(1–x %)Lu2x %O3 Solid Solution

Up-Conversion Luminescence and Temperature Sensing of Er3+/Yb3+ Codoped Y2(1–x %)Lu2x %O3 Solid Solution

Thermochromic Upconversion Emission in Tm3+/Yb3+-Codoped La2Mo3O12 Microparticles via Negative Thermal Expansion Engineering for Ultrahigh Sensitivity Optical Thermometry

Highly sensitive response of luminescence chromaticity to laser power in Lu2Mo4O15:Yb3+/Ho3+ upconverting materials

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Excitation-wavelength-dependent anti-thermal quenching of upconversion luminescence in hexagonal NaGdF₄:Nd³⁺/Yb³⁺/Er³⁺ nanocrystals

Up-Conversion Luminescence and Temperature Sensing of Er³⁺/Yb³⁺ Codoped Y_2(1–x %)Lu_2x %O₃ Solid Solution

Up-Conversion Luminescence and Temperature Sensing of Er³⁺/Yb³⁺ Codoped Y_2(1–x %)Lu_2x %O₃ Solid Solution

Thermochromic Upconversion Emission in Tm³⁺/Yb³⁺-Codoped La₂Mo₃O₁₂ Microparticles via Negative Thermal Expansion Engineering for Ultrahigh Sensitivity Optical Thermometry

Highly sensitive response of luminescence chromaticity to laser power in Lu₂Mo₄O₁₅:Yb³⁺/Ho³⁺ upconverting materials