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

被引：6
作者：
Wang, Lejian [1 ]
Zhang, Jingji [1 ]
Wang, Jiangying [1 ]
Yao, Yaxuan [2 ]
Ren, Lingling [2 ]
Chen, Xue [3 ]
Birkett, Martin [3 ]
Dala, Laurent [3 ]
Xu, Ben [3 ]
机构：
[1] China Jiliang Univ, Coll Mat & Chem, Hangzhou 310018, Peoples R China
[2] Natl Inst Metrol, Ctr Adv Metrol Sci, Beijing 100013, Peoples R China
[3] Northumbria Univ, Fac Engn & Environm, Dept Mech & Construct Engn, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
来源：
OPTICS LETTERS | 2020年 / 45卷 / 08期
关键词：
UP-CONVERSION LUMINESCENCE; HIGHLY EFFICIENT; NANOCRYSTALS; GLASS;
D O I：
10.1364/OL.391422
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel lead-free luminescent ferroelectric (FE) ceramic, Bi0.5Na0.5TiO3-0.06 BaTiO3-0.055 Sr0.7Bi0.18Er0.02 square 0.1TiO3 (BNT-BT-SBET), is developed with an adiabatic temperature change (Delta T) 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 Tsensitivity of 0.0055 K-1 at 522 K. Interestingly, the electrocaloric response reaches a saturation at permittivity shoulder T of 100 degrees C; meanwhile, the maximized emission intensity of H-2(11/2) -> I-4(15/2) occurs. T- and E-tunable enhancement of H-2(11/2) -> I-4(15/2) emission intensity is due to the population inversion from the (4)S(3/2 )to H-2(11/2) states caused by an incoherent regime consisting of FE phase and polar nanoregions in a relaxor matrix. (C) 2020 Optical Society of America
引用
收藏
页码：2391 / 2394
页数：4
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