Electro- and photon-induced cooling in BNT-BT-SBET relaxors with in situ optical temperature sensing

Lejian Wang; Jingji Zhang; Jiangying Wang; Yaxuan Yao; Lingling Ren; Xue Chen; Martin Birkett; Laurent Dala; Ben Bin Xu

doi:10.1364/ol.391422

Electro- and photon-induced cooling in BNT-BT-SBET relaxors with in situ optical temperature sensing

Lejian Wang, Jingji Zhang, Jiangying Wang, Yaxuan Yao, Lingling Ren, Xue Chen, Martin Birkett, Laurent Dala, Ben Bin Xu

Mechanical and Construction Engineering Department

Research output: Contribution to journal › Article › peer-review

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Abstract

A novel lead-free luminescent ferroelectric (FE) ceramic, Bi _0.5Na _0.5TiO ₃-0.06 BaTiO ₃-0.055 Sr _0.7Bi _0.18Er _{0.02 0.1} TiO ₃ (BNT-BT-SBET), is developed with an adiabatic temperature change (ΔT) of 0.7 K under an electric field (E) of 60 kV/cm at room temperature, an anti-Stokes fluorescence cooling, and a maximum optical T sensitivity of 0.0055 K ^-1 at 522 K. Interestingly, the electrocaloric response reaches a saturation at permittivity shoulder T of 100°C; meanwhile, the maximized emission intensity of ²H _11/2→ ⁴I _15/2 occurs. T- and E-tunable enhancement of ²H _11/2→ ⁴I _15/2 emission intensity is due to the population inversion from the ⁴S _3/2 to ²H _11/2 states caused by an incoherent regime consisting of FE phase and polar nanoregions in a relaxor matrix.

Original language	English
Pages (from-to)	2391-2394
Number of pages	4
Journal	Optics Letters
Volume	45
Issue number	8
Early online date	14 Apr 2020
DOIs	https://doi.org/10.1364/ol.391422
Publication status	Published - 15 Apr 2020

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title = "Electro- and photon-induced cooling in BNT-BT-SBET relaxors with in situ optical temperature sensing",

abstract = "A novel lead-free luminescent ferroelectric (FE) ceramic, Bi 0.5Na 0.5TiO 3-0.06 BaTiO 3-0.055 Sr 0.7Bi 0.18Er 0.02 0.1 TiO 3 (BNT-BT-SBET), is developed with an adiabatic temperature change (ΔT) of 0.7 K under an electric field (E) of 60 kV/cm at room temperature, an anti-Stokes fluorescence cooling, and a maximum optical T sensitivity of 0.0055 K -1 at 522 K. Interestingly, the electrocaloric response reaches a saturation at permittivity shoulder T of 100°C; meanwhile, the maximized emission intensity of 2H 11/2→ 4I 15/2 occurs. T- and E-tunable enhancement of 2H 11/2→ 4I 15/2 emission intensity is due to the population inversion from the 4S 3/2 to 2H 11/2 states caused by an incoherent regime consisting of FE phase and polar nanoregions in a relaxor matrix. ",

author = "Lejian Wang and Jingji Zhang and Jiangying Wang and Yaxuan Yao and Lingling Ren and Xue Chen and Martin Birkett and Laurent Dala and Xu, {Ben Bin}",

year = "2020",

month = apr,

day = "15",

doi = "10.1364/ol.391422",

language = "English",

volume = "45",

pages = "2391--2394",

journal = "Optics Letters",

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TY - JOUR

T1 - Electro- and photon-induced cooling in BNT-BT-SBET relaxors with in situ optical temperature sensing

AU - Wang, Lejian

AU - Zhang, Jingji

AU - Wang, Jiangying

AU - Yao, Yaxuan

AU - Ren, Lingling

AU - Chen, Xue

AU - Birkett, Martin

AU - Dala, Laurent

AU - Xu, Ben Bin

PY - 2020/4/15

Y1 - 2020/4/15

N2 - A novel lead-free luminescent ferroelectric (FE) ceramic, Bi 0.5Na 0.5TiO 3-0.06 BaTiO 3-0.055 Sr 0.7Bi 0.18Er 0.02 0.1 TiO 3 (BNT-BT-SBET), is developed with an adiabatic temperature change (ΔT) of 0.7 K under an electric field (E) of 60 kV/cm at room temperature, an anti-Stokes fluorescence cooling, and a maximum optical T sensitivity of 0.0055 K -1 at 522 K. Interestingly, the electrocaloric response reaches a saturation at permittivity shoulder T of 100°C; meanwhile, the maximized emission intensity of 2H 11/2→ 4I 15/2 occurs. T- and E-tunable enhancement of 2H 11/2→ 4I 15/2 emission intensity is due to the population inversion from the 4S 3/2 to 2H 11/2 states caused by an incoherent regime consisting of FE phase and polar nanoregions in a relaxor matrix.

AB - A novel lead-free luminescent ferroelectric (FE) ceramic, Bi 0.5Na 0.5TiO 3-0.06 BaTiO 3-0.055 Sr 0.7Bi 0.18Er 0.02 0.1 TiO 3 (BNT-BT-SBET), is developed with an adiabatic temperature change (ΔT) of 0.7 K under an electric field (E) of 60 kV/cm at room temperature, an anti-Stokes fluorescence cooling, and a maximum optical T sensitivity of 0.0055 K -1 at 522 K. Interestingly, the electrocaloric response reaches a saturation at permittivity shoulder T of 100°C; meanwhile, the maximized emission intensity of 2H 11/2→ 4I 15/2 occurs. T- and E-tunable enhancement of 2H 11/2→ 4I 15/2 emission intensity is due to the population inversion from the 4S 3/2 to 2H 11/2 states caused by an incoherent regime consisting of FE phase and polar nanoregions in a relaxor matrix.

UR - http://www.scopus.com/inward/record.url?scp=85083325206&partnerID=8YFLogxK

U2 - 10.1364/ol.391422

DO - 10.1364/ol.391422

M3 - Article

SN - 0146-9592

VL - 45

SP - 2391

EP - 2394

JO - Optics Letters

JF - Optics Letters

IS - 8

ER -

Electro- and photon-induced cooling in BNT-BT-SBET relaxors with in situ optical temperature sensing

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