The intensive up-conversion(UC)photoluminescence and temperature sensing behavior of Er3t-doped Bi_(7)Ti_(4)NbO_(21)(BTN)ferroelectric ceramics prepared by a conventional solid-state reaction technique have been inves...The intensive up-conversion(UC)photoluminescence and temperature sensing behavior of Er3t-doped Bi_(7)Ti_(4)NbO_(21)(BTN)ferroelectric ceramics prepared by a conventional solid-state reaction technique have been investigated.The X-ray diffraction and field emission scanning electron microscope analyses demonstrated that the Er3t-doped BTN ceramics are single phase and uniform flake-like structure.With the Er3t ions doping,the intensive UC emission was observed without obviously changing the properties of ferroelectric.The optimal emission intensity was obtained when Er doping level was 15 mol.%.The temperature sensing behavior was studied by fluorescence intensity ratio(FIR)technique of two green UC emission bands,and the experimental data fitted very well with the function of temperature in a range of 133–573 K.It suggested that the Er3t-doped BTN ferroelectric ceramics are very good candidates for applications such as optical thermometry,electro-optical devices and bio-imaging ceramics.展开更多
Er^(3+)and Yb^(3+)co-doped CaBi_(2)Ta_(2)O_(9)(CBT)-based bismuth layered-structure oxides were synthesized by a simple solid-state reaction method.Their up-conversion(UC)luminescence,dielectric and ferroelectric prop...Er^(3+)and Yb^(3+)co-doped CaBi_(2)Ta_(2)O_(9)(CBT)-based bismuth layered-structure oxides were synthesized by a simple solid-state reaction method.Their up-conversion(UC)luminescence,dielectric and ferroelectric properties were investigated.Two strong green emission bands centered at 526 and 547nm and a weak red emission band centered at 658nm were obtained under a 980nm laser excitation at room temperature.These emission bands originated from the radiative relaxation of Er^(3+)from 2H_(11)=2,4S_(3)=2,and 4F_(9/2) levels to the ground state 4I_(15)=2,respectively.At the meantime,the fluorescence intensity ratio(FIR)variation of two green UC emissions at 526 and 547nm has been studied as a function of temperature in the range of 153–603K.The maximum sensor sensitivity obtained was 39×10^(-4)K^(-1) at 590K,which indicated that Er^(3+)=Yb^(3+)co-doped CBT ceramic is a promising candidate for applications in optical high temperature sensor.展开更多
文摘The intensive up-conversion(UC)photoluminescence and temperature sensing behavior of Er3t-doped Bi_(7)Ti_(4)NbO_(21)(BTN)ferroelectric ceramics prepared by a conventional solid-state reaction technique have been investigated.The X-ray diffraction and field emission scanning electron microscope analyses demonstrated that the Er3t-doped BTN ceramics are single phase and uniform flake-like structure.With the Er3t ions doping,the intensive UC emission was observed without obviously changing the properties of ferroelectric.The optimal emission intensity was obtained when Er doping level was 15 mol.%.The temperature sensing behavior was studied by fluorescence intensity ratio(FIR)technique of two green UC emission bands,and the experimental data fitted very well with the function of temperature in a range of 133–573 K.It suggested that the Er3t-doped BTN ferroelectric ceramics are very good candidates for applications such as optical thermometry,electro-optical devices and bio-imaging ceramics.
基金This work was supported by the Natural Science Foundation of China(No.51072136).
文摘Er^(3+)and Yb^(3+)co-doped CaBi_(2)Ta_(2)O_(9)(CBT)-based bismuth layered-structure oxides were synthesized by a simple solid-state reaction method.Their up-conversion(UC)luminescence,dielectric and ferroelectric properties were investigated.Two strong green emission bands centered at 526 and 547nm and a weak red emission band centered at 658nm were obtained under a 980nm laser excitation at room temperature.These emission bands originated from the radiative relaxation of Er^(3+)from 2H_(11)=2,4S_(3)=2,and 4F_(9/2) levels to the ground state 4I_(15)=2,respectively.At the meantime,the fluorescence intensity ratio(FIR)variation of two green UC emissions at 526 and 547nm has been studied as a function of temperature in the range of 153–603K.The maximum sensor sensitivity obtained was 39×10^(-4)K^(-1) at 590K,which indicated that Er^(3+)=Yb^(3+)co-doped CBT ceramic is a promising candidate for applications in optical high temperature sensor.
