Temperature/electric field induced photoluminescence-modulation effect in dysprosium-doped barium titanate ferroelectric ceramics  

作　　者：Lei Xia Xiao Liu Zhan Mao Yanbin Cai Jing Zhu Jiyang Xie Wanbiao Hu 

机构地区：[1]Yunnan Key Laboratory of Electromagnetic Materials and Devices,National Center for International Research on Photoelectric and Energy Materials,School of Materials and Energy,Yunnan University,Kunming,650091,China [2]Electron Microscopy Center,Yunnan University,Kunming,650091,China [3]University of Science and Technology of China,Hefei,230026,China

出　　处：《Journal of Materiomics》2024年第5期1117-1125,共9页无机材料学学报（英文）

基　　金：This work was supported by the Natural Science Foundation of China(Grant Nos.22175150,52362037 and U2002217);the Basic Research Program of Yunnan Province(Grant No.202101AT070002);the Key R&D program of Yunnan Province(Grant No.2018BA068).

摘　　要：Lanthanide(Ln^(3+))based ferroelectric phosphors,with an integration of PL emission and ferroelectric effect,are unveiling an exciting realm of possibilities for multifunctional ferroelectric-optic materials.However,how the ferroelectric host enables the tuning on the PL emissions through modulating the local structure(e.g.,lattice site,symmetry,strains etc.)of the Ln^(3+)activator is not established yet.In this work,a luminescent-ferroelectric material,i.e.Dy^(3+)doped BaTiO_(3) ceramic(Ba_(1–x)Dy_(x)TiO_(3)(x=0–0.07),abbr:BTO:Dy^(3+)),was explored to address the aforementioned issues.The BTO:Dy^(3+)ceramics were synthesized by a solid-state reaction method.The crystal structure,photoluminescence(PL)and electric properties(dielectric constant,ferroelectric hysteresis and piezoelectric hysteresis loop)were systematically investigated.The BTO:Dy^(3+)ceramics show two predominant emission peaks,corresponding to the blue magnetic dipole transition(477 nm,^(4)F_(7/2)→^(6)H_(15/2))and yellow electric dipole transition(573 nm,^(4)F_(7/2)→^(6)H_(13/2)),the intensity ration of which can be modulated by the ferroelectric polarization that causes the slight lattice deformation.Such a polarization-emission modulation combining with the Dy^(3+) doping could accelerate the color change,from yellow to blue,which is characterized to detect the phase transition,with a method and mechanism were proposed,that is,the phase change is reflected by the PL characteristic peak intensity ratio.Therefore,the current results offer a convenient photoluminescence method for detecting the ferroelectric phase transition and a feasible approach to study the interaction between the photoluminescence and polarization in ferroelectric materials,for providing new insights for the development of multifunctional materials.

关 键 词：PHOTOLUMINESCENCE Barium titanate MODULATION Ferroelectric ceramics 

分 类 号：TQ174.1[化学工程—陶瓷工业]