Thermal effect on up-conversion in Er3+/Yb3+ co-doped silicate glass

Zhou, Song-Qiang; Li, Chengren; Liu, Zhongfan; Li, Shufeng; Chen, Song

doi:10.1016/j.optmat.2007.01.005

Cited by 44 publications

(7 citation statements)

References 17 publications

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“…As shown in Table , the S A values of CaSc 2 O 4 and SrSc 2 O 4 samples are relatively high at a high temperature of 600 K, implying that they can be used as excellent optical temperature sensors under high-temperature conditions. Furthermore, the current optimum S R is 1289/T 2 , which is reported for silicate glass, to the best of our knowledge. , The S R values of CaSc 2 O 4 :Er 3+ /Yb 3+ and SrSc 2 O 4 :Er 3+ /Yb 3+ samples in the presence of Li + ions are expressed as 1197/T 2 and 1129/T 2 , respectively, which are very close to the optimal S R values of silicate glass ( S R =1289/T 2 ). S R depends on the Δ E value, and many groups try to look for the appropriate host having a large Δ E to improve the S R value.…”

Section: Resultssupporting

confidence: 71%

Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er³⁺/Yb³⁺ Ions in the Presence of Alkali Ions (Li⁺, Na⁺, and K⁺)

Shi

Yuan

et al. 2022

Inorg. Chem.

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Temperature-sensing media based on the fluorescence intensity ratio (FIR) of upconversion materials that suffer from low sensitivity owing to the small energy gap still have a need for new compounds with strong upconversion luminescence (UCL). In this work, a series of MSc2O4:Er3+/Yb3+ (M = Mg, Ca, Sr, and Ba) nanocrystals were prepared by a hydrothermal method using NaOH alkaline solution. The structure, morphology, and UCL characteristics of materials were investigated, and the red UCL of the CaSc2O4:Er3+/Yb3+ sample was dramatically enhanced by a factor of ∼12, ∼23, and ∼2000 compared with SrSc2O4, MgSc2O4, and BaSc2O4 samples, respectively. By adjusting alkali ions (Li+, Na+, K+), the UCL intensities of CaSc2O4:Er3+/Yb3+ and SrSc2O4:Er3+/Yb3+ samples were further improved, especially in the presence of Li+ ions. Excellent temperature-sensing behaviors are realized for CaSc2O4:Er3+/Yb3+ and SrSc2O4:Er3+/Yb3+ samples in the presence of Li+ ions, in which the maximum absolute sensitivity S A values are about 0.0041 and 0.0036 K–1 at 600 K and the corresponding relative sensitivity S R values are expressed as 1197/T2 and 1129/T2 (the current optimal S R = 1289/T2), respectively. The intense UCL and excellent S A and S R values indicate that CaSc2O4:Er3+/Yb3+ and SrSc2O4:Er3+/Yb3+ materials are promising candidates for application in high-temperature sensors working under 980 nm excitation.

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Section: Resultssupporting

confidence: 71%

Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er³⁺/Yb³⁺ Ions in the Presence of Alkali Ions (Li⁺, Na⁺, and K⁺)

Shi

Yuan

et al. 2022

Inorg. Chem.

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“…As a consequence, significant variety in temperature-dependent lifetime can be expected, and a useful level control is made possible by modifying the crystal-field strength via the variation of the host material. On the other hand, trivalent RE ion (such as Yb 3+ /Er 3+ ) doped UC materials are advantageous for FIR-based thermometric applications due to the obvious temperature-dependent emissions that originated from the two thermally coupled Er 3+ H 11/2 and 4 S 3/2 emitting states. ,,, In order to advance their direct applications in highly sensitive temperature sensing, it is quite valuable to explore optical materials with multifunctionality, for example, exhibiting both temperature-dependent UC FIR and temperature-dependent decay lifetime. However, as far as we know, there is no report concerning the achievement of both temperature-dependent UC FIR of Er 3+ and temperature-dependent decay lifetime of Cr 3+ in a sole host so far.…”

Section: Introductionmentioning

confidence: 99%

Dual-Phase Glass Ceramic: Structure, Dual-Modal Luminescence, and Temperature Sensing Behaviors

Chen

Wan

Zhou

et al. 2015

ACS Appl. Mater. Interfaces

260

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Yb(3+)/Er(3+)/Cr(3+) triply doped transparent bulk glass ceramic containing orthorhombic YF3 and cubic Ga2O3 nanocrystals was fabricated by a melt-quenching route to explore its possible application in optical thermometry with high spatial and temperature resolution. It was experimentally observed that Yb(3+)/Er(3+) ions incorporated into the precipitated YF3 nanophase, while Cr(3+) ions partitioned into the crystallized Ga2O3 nanophase after glass crystallization. Importantly, such spatial isolation strategy efficiently suppressed adverse energy transfer among different active ions. As a consequence, intense green anti-Stokes luminescence originated from Er(3+): (2)H11/2,(4)S3/2 → (4)I15/2 transitions, and deep-red Stokes luminescence transitions assigned to Cr(3+): (2)E → (4)A2 radiation were simultaneously realized. Impressively, the intermediate crystal-field environment for Cr(3+) in Ga2O3 made it possible for lifetime-based temperature sensing owing to the competition of radiation transitions from the thermally coupled Cr(3+) (2)E and (4)T2 excited states. In the meantime, the low-phonon-energy environment for Er(3+) in YF3 was beneficial for upconversion fluorescence intensity ratio-based temperature sensing via thermal population between the (2)H11/2 state and (4)S3/2 state. The Boltzmann distribution theory and the two-level kinetic model were adopted to interpret these temperature-dependent luminescence of Er(3+) and Cr(3+), respectively, which gave the highest temperature sensitivities of 0.25% K(-1) at 514 K for Er(3+) and 0.59% K(-1) at 386 K for Cr(3+).

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“…Conversely, the intensity of green emissions increased with increasing temperature, which does not satisfy the classical theory of thermal quenching, likely due to the increased Yb 3+ absorption cross-section at elevated temperatures [22,24]. A general theoretical description of the green upconversion emission can be given by [22]:

I_{g r e e n} = B {[1 - \exp (- \frac{h ν}{k T})]}^{- 2}

where B is a constant, and hν is the phonon energy participating in the multiphonon-assisted excitation.…”

Section: Resultsmentioning

confidence: 99%

Multiple Temperature-Sensing Behavior of Green and Red Upconversion Emissions from Stark Sublevels of Er3+

Cao

Wang

et al. 2015

Sensors

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Upconversion luminescence properties from the emissions of Stark sublevels of Er3+ were investigated in Er3+-Yb3+-Mo6+-codoped TiO2 phosphors in this study. According to the energy levels split from Er3+, green and red emissions from the transitions of four coupled energy levels, 2H11/2(I)/2H11/2(II), 4S3/2(I)/4S3/2(II), 4F9/2(I)/4F9/2(II), and 2H11/2(I) + 2H11/2(II)/4S3/2(I) + 4S3/2(II), were observed under 976 nm laser diode excitation. By utilizing the fluorescence intensity ratio (FIR) technique, temperature-dependent upconversion emissions from these four coupled energy levels were analyzed at length. The optical temperature-sensing behaviors of sensing sensitivity, measurement error, and operating temperature for the four coupled energy levels are discussed, all of which are closely related to the energy gap of the coupled energy levels, FIR value, and luminescence intensity. Experimental results suggest that Er3+-Yb3+-Mo6+-codoped TiO2 phosphor with four pairs of energy levels coupled by Stark sublevels provides a new and effective route to realize multiple optical temperature-sensing through a wide range of temperatures in an independent system.

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Thermal effect on up-conversion in Er3+/Yb3+ co-doped silicate glass

Cited by 44 publications

References 17 publications

Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er³⁺/Yb³⁺ Ions in the Presence of Alkali Ions (Li⁺, Na⁺, and K⁺)

Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er³⁺/Yb³⁺ Ions in the Presence of Alkali Ions (Li⁺, Na⁺, and K⁺)

Dual-Phase Glass Ceramic: Structure, Dual-Modal Luminescence, and Temperature Sensing Behaviors

Multiple Temperature-Sensing Behavior of Green and Red Upconversion Emissions from Stark Sublevels of Er3+

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Thermal effect on up-conversion in Er3+/Yb3+ co-doped silicate glass

Cited by 44 publications

References 17 publications

Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er3+/Yb3+ Ions in the Presence of Alkali Ions (Li+, Na+, and K+)

Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er3+/Yb3+ Ions in the Presence of Alkali Ions (Li+, Na+, and K+)

Dual-Phase Glass Ceramic: Structure, Dual-Modal Luminescence, and Temperature Sensing Behaviors

Multiple Temperature-Sensing Behavior of Green and Red Upconversion Emissions from Stark Sublevels of Er3+

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Product

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Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er³⁺/Yb³⁺ Ions in the Presence of Alkali Ions (Li⁺, Na⁺, and K⁺)

Upconversion Properties and Temperature-Sensing Behaviors of Alkaline-Earth-Metal Scandate Nanocrystals Doped with Er³⁺/Yb³⁺ Ions in the Presence of Alkali Ions (Li⁺, Na⁺, and K⁺)