Optical temperature sensing through extraordinary enhancement of green up-conversion emissions for Er–Yb–Mo:Al2O3

Dong, Bo; Cao, Baosheng; Feng, Zhi-Qiang; Wang, X.J.; He, Yangyang

doi:10.1016/j.snb.2012.01.068

Cited by 75 publications

(24 citation statements)

References 16 publications

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“…The UC emission spectra have been recorded by varying the temperature for both the phosphors. Temperature sensing study has been reported by several researchers in different RE ions doped materials [16,17,[41][42][43][44][45]. The two green colour emitting levels ( 2 H 11/2 and 4 S 3/2 ) from Er 3+ in the present host are thermally coupled (∼716 cm −1 ) and the population of these two levels are affected by change in temperature.…”

Section: Temperature Sensing Study By Using Green Uc Emission Bandsmentioning

confidence: 76%

“…The calculated intensity ratio variation in the BaMoO 4 :Er 3+ phosphor is found to vary from 0.83 to 1.0 whereas in the BaMoO 4 :Er 3+ -Yb 3+ phosphor the intensity ratio is changed from 1.1 to 1.7. The intensity ratio for green UC emissions at 531 nm and 552 nm can be related according to the following equation [41],…”

Section: Temperature Sensing Study By Using Green Uc Emission Bandsmentioning

confidence: 99%

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Optical investigation in shuttle like BaMoO4:Er3+–Yb3+ phosphor in display and temperature sensing

Soni

Kumari

Kumar

2015

Sensors and Actuators B: Chemical

159

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Section: Temperature Sensing Study By Using Green Uc Emission Bandsmentioning

confidence: 76%

Section: Temperature Sensing Study By Using Green Uc Emission Bandsmentioning

confidence: 99%

Optical investigation in shuttle like BaMoO4:Er3+–Yb3+ phosphor in display and temperature sensing

Soni

Kumari

Kumar

2015

Sensors and Actuators B: Chemical

159

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“…The sensitivity of optical thermometry is the rate of change of R in response to the variation of temperature [37, 38]. The relative sensitivity S R and the absolute sensitivity S A are defined as: …”

Section: Resultsmentioning

confidence: 99%

“…It is important to investigate the sensing sensitivity for further understand the temperature response of NGF1 and NGF3. The sensitivity of optical thermometry is the rate of change of R in response to the variation of temperature [ 37 , 38 ]. The relative sensitivity S R and the absolute sensitivity S A are defined as: …”

Section: Resultsmentioning

confidence: 99%

Tm3+ Modified Optical Temperature Behavior of Transparent Er3+-Doped Hexagonal NaGdF4 Glass Ceramics

Chengqi

Meng

et al. 2017

Nanoscale Res Lett

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Er3+-doped and Er3+-Tm3+-co-doped transparent hexagonal NaGdF4 glass ceramics are fabricated via melt-quenching method. The emissions of Er3+-doped NaGdF4 glass ceramics are adjusted from the green to red by varying the concentration of Tm3+ ion under the excitation of 980 nm. The spectrum, thermal quenching ratio, fluorescence intensity ratios, and optical temperature sensitivity of the transparent glass ceramics are observed to be dependent on the pump power. The maximum value of relative sensitivity reaches 0.001 K−1 at 334 K in Er3+-doped NaGdF4, which shifts toward the lower temperature range by co-doping with Tm3+ ions, and has a maximum value of 0.00081 K−1 at 292 K. This work presents a method to improve the optical temperature behavior of Er3+-doped NaGdF4 glass ceramics. Moreover, the relative sensitivity SR is proved to be dependent on the pump power of 980-nm lasers in Er3+-doped NaGdF4 and Er3+-Tm3+-co-doped NaGdF4.

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“…[13][14][15][16] LPL is a process with luminescence last for minutes to hours at room temperature after the stoppage of the excitation. [25][26][27] Overall, codoping Er 3+ in Yb 3+ -Cr 3+ 18 Again, Cr 3+ is the most potential NIR LPL ion with outstanding performance.…”

Section: ⅰ ⅰ ⅰ ⅰIntroductionmentioning

confidence: 96%

Multifunctionalities of near-infrared upconversion luminescence, optical temperature sensing and long persistent luminescence in La₃Ga₅GeO₁₄:Cr³⁺,Yb³⁺,Er³⁺and their potential coupling

et al. 2015

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The multifunctionalities of La 3 Ga 5 GeO 14 :Cr 3+ ,Yb 3+ ,Er 3+ (LGG:Cr 3+ ,Yb 3+ ,Er 3+ ) with respective functions of near-infrared (NIR) upconversion (UC) luminescence, optical temperature sensing (OTS) and long persistent luminescence (LPL) were carried out and investigated in detail, which makes the materials attractive for bioapplications.The NIR UC luminescence at ~830 nm with deep penetration in tissues is ascribed to the 4 T 2 → 4 A 2 transition of Cr 3+ . OTS function based on the intensity ratio variation of 2 H 11/2 → 4 I 15/2 to 4 S 3/2 → 4 I 15/2 transitions of Er 3+ ion detected that the thermal effects of the UC material caused by the laser irradiation ranges from 307 to 332 K for pumping power of 60 to 86 mW mm -2 . It also showed LPL of Cr 3+ with defects trap depth of ~0.77 eV below the conduction band, benefiting excitation-free and noise-free imaging in tissues. Additionally, anomalous temperature dependant UC emission behaviours of Cr 3+ and Er 3+ in this material were also characterized and discussed, which can be understood by the configurational coordinate (CC) model and the complex foreward and backward energy transfer processes among the dopants, respectively. The potential coupling of these functions was further discussed, such as UC induced NIR LPL, which would repetitively restrengthen the fading LPL signals and alerting the operators to thermal damage of the biosystems by NIR laser in the tissue imaging.LGG has a space group of P321, its 2d site is disorderly occupied by 50% of Ga (2) and 50% of Ge. Layers formed by (Ga/Ge)O 4 tetrahedrons and GaO 4 tetrahedrons sharing the corner are connected by GaO 6 octahedra along c axis, with La 3+ ions in the forming cages of the framework (as seen in Fig. 3). Some typical cation-cation distances are also listed in Table 1. It should be noted that the distance between La-Ga is shorter than that of La-La.

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Optical temperature sensing through extraordinary enhancement of green up-conversion emissions for Er–Yb–Mo:Al2O3

Cited by 75 publications

References 16 publications

Optical investigation in shuttle like BaMoO4:Er3+–Yb3+ phosphor in display and temperature sensing

Optical investigation in shuttle like BaMoO4:Er3+–Yb3+ phosphor in display and temperature sensing

Tm3+ Modified Optical Temperature Behavior of Transparent Er3+-Doped Hexagonal NaGdF4 Glass Ceramics

Multifunctionalities of near-infrared upconversion luminescence, optical temperature sensing and long persistent luminescence in La₃Ga₅GeO₁₄:Cr³⁺,Yb³⁺,Er³⁺and their potential coupling

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Optical temperature sensing through extraordinary enhancement of green up-conversion emissions for Er–Yb–Mo:Al2O3

Cited by 75 publications

References 16 publications

Optical investigation in shuttle like BaMoO4:Er3+–Yb3+ phosphor in display and temperature sensing

Optical investigation in shuttle like BaMoO4:Er3+–Yb3+ phosphor in display and temperature sensing

Tm3+ Modified Optical Temperature Behavior of Transparent Er3+-Doped Hexagonal NaGdF4 Glass Ceramics

Multifunctionalities of near-infrared upconversion luminescence, optical temperature sensing and long persistent luminescence in La3Ga5GeO14:Cr3+,Yb3+,Er3+and their potential coupling

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Multifunctionalities of near-infrared upconversion luminescence, optical temperature sensing and long persistent luminescence in La₃Ga₅GeO₁₄:Cr³⁺,Yb³⁺,Er³⁺and their potential coupling