Emission color-tunable and optical temperature sensing properties of Er3 / La3 co-doped (K0.5Na0.5)NbO3 optoelectronic transparent ceramic
Emission color-tunable and optical temperature sensing properties of Er3 / La3 co-doped (K0.5Na0.5)NbO3 optoelectronic transparent ceramic
复制标题
Er3/La3共掺(K0.5Na0.5)NbO3光电透明陶瓷的发射颜色可调及光学温度传感特性
DOI：
10.1016/j.jlumin.2019.05.023
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发表时间：
2019
影响因子：
3.6
通讯作者：
Luo Laihui
中科院分区：
文献类型：
--
作者：
Lin Jinfeng;Jing Weidong;Wang Huajing;Xu Jie;Wu Xiao;Lin Cong;Lin Tengfei;Zheng Xinghua;Luo Laihui
采用无压烧结法制备了Er3+/La3+共掺杂透明（K0.5Na0.5） nbo3陶瓷。XRD结果表明，该材料具有高度对称的准立方钙钛矿结构，无杂质相。该陶瓷晶粒细，平均尺寸为~ 350 nm，晶粒分布均匀，孔隙率低，密度高。0.3 mm陶瓷在可见光区域的透光率高达~ 60%。此外，该陶瓷具有良好的介电性能和类弛豫特性。在980 nm激发下，Er3+的温度依赖上转换发光颜色在523 K以下稳定，在523 K以上可调（随着温度的升高从绿色变为橘红色）。红绿发射强度随温度的比值可以为该铁电陶瓷的相变提供一种非接触发光途径。进一步研究了该陶瓷的荧光感温性能，在380 K时最大灵敏度为0.003/K。由于其光学、PL和电学性能，透明陶瓷在光电耦合器件中显示出潜在的应用潜力。
Transparent Er3+/La3+co-doped (K0.5Na0.5)NbO3ceramic was prepared by pressureless sintering. The XRD result shows that it possesses high symmetrical pseudo-cubic perovskite structure without impurity phase. The ceramic owns fine grains with the average size of ∼350 nm, uniform grain distribution, low porosity and high density. The optical transmittance of 0.3-mm ceramic is up to ∼60% in the visible region. Additionally, the ceramic has good dielectric properties with the relaxor-like behavior. Under an excitation of 980-nm, the temperature-dependent up-conversion luminescent color of Er3+is stable below 523 K and adjustable (changing from green to tangerine color as temperature increases) above 523 K. The ratio of red to green emission intensity with temperature can provide a non-contact luminescent route to roughly detect the phase transition of this ferroelectric ceramic. Furthermore, the fluorescence temperature sensing performance of the ceramic was investigated and the maximum sensitivity is 0.003/K at 380 K. Due to optical, PL and electrical properties, the transparent ceramic shows potential in the application of electro-optical coupling devices.