Thermometric and optical heating bi-functional properties of upconversion phosphor Ba5Gd8Zn4O21:Yb3+/Tm3+

Suo, Hao; Guo, Chongfeng; Yang, Zheng; Zhou, Shaoshuai; Duan, Chang‐Kui; Yin, Min

doi:10.1039/c5tc01054c

Cited by 218 publications

(67 citation statements)

References 32 publications

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“…In recent years, upconversion (UC) luminescent materials have attracted much attention due to their wide application in color displays [1,2], compact solid lasers devices [3], optical sensors [4][5][6][7], high efficiency solar cells [8,9] and bioimaging [10,11]. UC luminescence is a typical process in which low energy photons are absorbed by UC luminescent materials and then high energy photons are generated.…”

Section: Introductionmentioning

confidence: 99%

Insight in bipolar mania: evaluation of its heterogeneity and correlation with clinical symptoms

Silva

Mograbi

Bifano

et al. 2016

Journal of Affective Disorders

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Section: Introductionmentioning

confidence: 99%

Insight in bipolar mania: evaluation of its heterogeneity and correlation with clinical symptoms

Silva

Mograbi

Bifano

et al. 2016

Journal of Affective Disorders

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“…[ 9,12 ] In contract, a wide energy gap between TCL would benefi t S r and the signal discriminability, but weaken the thermal coupling of TCL, leading to a low S a . [ 13,15 ] Generally speaking, in the TCL-based optical thermometry, simultaneously promoting S a , S r and signal discriminability is almost impossible.Other kinds of thermometry strategy have also been introduced into the optical thermometric technique. For example, the phonon assisted energy transfer between Eu 3+ and Tb 3+ ions has been utilized in optical thermometry.…”

mentioning

confidence: 99%

A Novel Optical Thermometry Strategy Based on Diverse Thermal Response from Two Intervalence Charge Transfer States

Gao

Huang

Lin

et al. 2016

Adv Funct Materials

485

206

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3139wileyonlinelibrary.com discriminable emission peaks as the monitored signals, and to suppress absolute and relative detecting errors, high absolute and relative temperature sensitivities are required.In this aspect, conventional investigations focus on the thermally coupled level pairs (TCL) of rare earth ions (for example, 2 H 11/2 and 4 S 3/2 level for Er 3+). [7][8][9][10][11][12][13][14][15] Typically, with variation of temperature, population in the upper and lower levels of TCL would change oppositely, inducing variation in FIR of these two levels. For this type of temperature sensing materials, a narrow energy gap between TCL would favor the absolute temperature sensitivity ( S a ), but be harmful to the relative temperature sensitivity ( S r ). In addition, the narrow energy gap would induce overlap of the two monitored emission peaks, resulting in an inferior signal discriminability. [ 9,12 ] In contract, a wide energy gap between TCL would benefi t S r and the signal discriminability, but weaken the thermal coupling of TCL, leading to a low S a . [ 13,15 ] Generally speaking, in the TCL-based optical thermometry, simultaneously promoting S a , S r and signal discriminability is almost impossible.Other kinds of thermometry strategy have also been introduced into the optical thermometric technique. For example, the phonon assisted energy transfer between Eu 3+ and Tb 3+ ions has been utilized in optical thermometry. [16][17][18][19] However, this kind of thermometry is usually applicable only at temperature below 320 K. Nanocomposites containing quantum dots and rare earth ions have also been applied as thermometric materials relying on the different thermal quenching behaviors of quantum dots and rare earth ions. [ 20,21 ] However, FIR of these materials is easily infl uenced by other environment parameters (such as pH value), which would introduce error in temperature detection. Apparently, searching for new thermometry strategy to develop high-performance luminescent temperature sensing materials is highly desired.In previous studies, the metal-to-metal intervalence charge transfer (IVCT) processes between lanthanide (Pr 3+ or Tb 3+ ) and d 0 electron confi gured transition metal ions (Ti 4+ , V 5+ , Nb 5+ , Mo 6+ , or W 6+ ) in oxide crystals have been demonstrated to be an effective pathway to excite the corresponding lanthanide ions. [22][23][24][25][26] Moreover, IVCT can provide an effi cient quenching A Novel Optical Thermometry Strategy Based on Diverse Thermal Response from Two Intervalence Charge Transfer StatesYan Gao , Feng Huang , * Hang Lin , Jiangcong Zhou , Ju Xu , and Yuansheng Wang * In this work, a novel thermometry strategy based on the diversity in thermal quenching behavior of two intervalence charge transfer (IVCT) states in oxide crystals is proposed, which provides a promising route to design selfreferencing optical temperature sensing material with superior temperature sensitivity and signal discriminability.

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“…As is known, the sensor sensitivity of the RE ions based optical thermometers could be determined by several factors, such as particle size, dopant content, host materials, pump power, etc. [ 9,47 ] To clarify the relation between the sensor sensitivity and dopant concentration, we studied the temperature sensing ability of the Bi 5 IO 7 : x Er 3+ microparticles with different Er 3+ ion concentration. The normalized temperature‐dependent green UC emission spectra of the Bi 5 IO 7 : x Er 3+ microparticles with diverse doping concentrations of 1 and 9 mol% were measured, as shown in Figure S8a,b (Supporting Information), respectively, under 980 nm light excitation.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic and Thermometric Characteristics of Er³⁺‐Activated Bi₅IO₇ Upconverting Microparticles

Luo

Ran

et al. 2020

Adv Materials Inter

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Series of Er3+‐activated Bi5IO7 upconverting microparticles are prepared by using a wet chemical technology along with a dedicated heating process. The electronic structure of the Bi5IO7 host is systematically studied by employing the first‐principle density functional theory. The near‐infrared (NIR) triggered upconversion (UC) behaviors of the prepared samples are studied and the optimal doping content for Er3+ ions is determined to be 7 mol%. The involved luminescent mechanism is verified by the pump power dependent UC emission spectra. Through the fluorescence intensity rate route based on the 2H11/2 and 4S3/2 thermally coupled levels, the thermometric properties of the final compounds are investigated in detail. The maximum absolute and relative sensor sensitivities of the resultant microparticles are 0.0069 K‐1 and 1.36% K‐1, respectively, importantly, these values are independent on the Er3+ ion content. The photocatalytic activity of the resultant microparticles are evaluated by analyzing the degradation of RhB under the irradiation of visible and NIR light. The results demonstrate that the Er3+‐activated Bi5IO7 microparticles are promising bifunctional platforms for optical thermometers and visible‐NIR light triggered photocatalysis.

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Thermometric and optical heating bi-functional properties of upconversion phosphor Ba₅Gd₈Zn₄O₂₁:Yb³⁺/Tm³⁺

Abstract: An optical temperature sensor and optical heater based on Yb3+/Tm3+ co-doped Ba5Gd8Zn4O21 phosphors.

Cited by 218 publications

References 32 publications

Insight in bipolar mania: evaluation of its heterogeneity and correlation with clinical symptoms

Insight in bipolar mania: evaluation of its heterogeneity and correlation with clinical symptoms

A Novel Optical Thermometry Strategy Based on Diverse Thermal Response from Two Intervalence Charge Transfer States

Photocatalytic and Thermometric Characteristics of Er³⁺‐Activated Bi₅IO₇ Upconverting Microparticles

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Thermometric and optical heating bi-functional properties of upconversion phosphor Ba5Gd8Zn4O21:Yb3+/Tm3+

Abstract: An optical temperature sensor and optical heater based on Yb3+/Tm3+ co-doped Ba5Gd8Zn4O21 phosphors.

Cited by 218 publications

References 32 publications

Insight in bipolar mania: evaluation of its heterogeneity and correlation with clinical symptoms

Insight in bipolar mania: evaluation of its heterogeneity and correlation with clinical symptoms

A Novel Optical Thermometry Strategy Based on Diverse Thermal Response from Two Intervalence Charge Transfer States

Photocatalytic and Thermometric Characteristics of Er3+‐Activated Bi5IO7 Upconverting Microparticles

Contact Info

Product

Resources

About

Thermometric and optical heating bi-functional properties of upconversion phosphor Ba₅Gd₈Zn₄O₂₁:Yb³⁺/Tm³⁺

Photocatalytic and Thermometric Characteristics of Er³⁺‐Activated Bi₅IO₇ Upconverting Microparticles