Upconversion based temperature sensing ability of Er3+–Yb3+codoped SrWO4: An optical heating phosphor

Pandey, Anurag; Kumar, Vineet; Kumar, Vinod; Kumar, Vijay; Swart, H.C.

doi:10.1016/j.snb.2014.11.126

Cited by 364 publications

(124 citation statements)

References 35 publications

(41 reference statements)

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“…As a comparison, the reported highest S a and S r is only 0.015 K −1 and 1.1% K −1 , respectively, for the thermometric materials based on TCL of Er 3+ . [ 28,29 ] Moreover, the monitored peaks of Pr 3+ (≈604 nm) and Tb 3+ (≈544 nm) are well separated, which endows the Tb 3+ /Pr 3+ :NaGd(MoO 4 ) 2 thermometric material a good signal discriminability for temperature detection.…”

Section: Resultsmentioning

confidence: 90%

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

509

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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Section: Resultsmentioning

confidence: 90%

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

509

206

View full text Add to dashboard Cite

show abstract

“…4 I 15/2 transition [13]. Temperature sensing properties of the lanthanide doped CaWO 4 and SrWO 4 had been reported previously [8,9,21], which exhibits certain advantages in both brightness and temperature sensitivity. Especially, the maximal sensitivity detected in Er 3+ /Yb 3+ :SrWO 4 is the highest record reported so far [21].…”

Section: Introductionmentioning

confidence: 93%

Yb3+/Er3+ co-doped CaMoO4: a promising green upconversion phosphor for optical temperature sensing

Huang

Gao

Zhou

et al. 2015

Journal of Alloys and Compounds

186

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“…4 I 15/2 transitions at different pump power density upon 980 nm and 808 nm NIR laser diode excitations at room temperature. On increasing the laser pump power density the observed variations in the FIR values helps to predict the temperature rise by diode laser excitations [34]. The temperature developed inside the prepared phosphor upon NIR excitation at different pump power densities can be calculated by using the following Eq.…”

Section: Optical Heating Based Studymentioning

confidence: 99%

“…(3) under 808 nm laser diode excitation increases from $314 K to $370 K as the pump power density varies from 7.10 W/cm 2 to 64.93 W/cm 2 . The crystalline nature of the Er 3+ -Yb 3+ codoped SrMoO 4 phosphor after getting the excitation energy, produce heating effect due to electron-phonon coupling or non-radiative relaxation processes [26,34]. It is known that the overall excitation energy is not utilized in the UC emission process.…”

Section: Optical Heating Based Studymentioning

confidence: 99%

Thermal and pump power effect in SrMoO4:Er3+-Yb3+ phosphor for thermometry and optical heating

Soni

Kumar

2017

Chemical Physics Letters

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Upconversion based temperature sensing ability of Er3+–Yb3+codoped SrWO4: An optical heating phosphor

Cited by 364 publications

References 35 publications

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

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

Yb3+/Er3+ co-doped CaMoO4: a promising green upconversion phosphor for optical temperature sensing

Thermal and pump power effect in SrMoO4:Er3+-Yb3+ phosphor for thermometry and optical heating

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