Pr^(3+)共掺杂调控的Li_(0.9)K_(0.1)NbO_(3):Er^(3+)荧光粉上/下转换双模式光学测温研究  

Dual-mode up/down-conversion optical thermometry of Pr^(3+)-regulated Li_(0.9)K_(0.1)NbO_(3):Er^(3+)phosphors

作　　者：贾朝阳 杨雪 王志刚 柴瑞鹏 庞庆[1] 张翔宇[2] 高当丽[1] Jia Chao-Yang;Yang Xue;Wang Zhi-Gang;Chai Rui-Peng;Pang Qing;Zhang Xiang-Yu;Gao Dang-Li(College of Science,Xi’an University of Architecture and Technology,Xi’an 710055,China;College of Science,Chang’an University,Xi’an 710064,China)

机构地区：[1]西安建筑科技大学理学院,西安710055 [2]长安大学理学院,西安710064

出　　处：《物理学报》2023年第24期142-152,共11页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11604253,51672208);陕西省重点科技创新团队项目(批准号:2022TD-34);中央高校基本科研业务费专项资金(批准号:300102120101)资助的课题。

摘　　要：光热传感对于智能穿戴设备的开发至关重要.然而,设计合成具有合适多波长发射的发光材料,并在单一材料体系中利用多组探针构建宽温度范围的高灵敏温度传感器是一个巨大挑战.本研究采用高温固相法成功制备了Li_(0.9)K_(0.1)NbO_(3):Pr^(3+)/Er^(3+)单掺及双掺荧光粉.通过X射线衍射仪、扫描电子显微镜、荧光光谱仪以及自制的加热装置对其结构、形貌及激发波长和温度依赖的荧光特性进行了表征.详细研究了Er^(3+)单掺与Pr^(3+),Er^(3+)共掺样品的上/下转换荧光及Er^(3+)的双模荧光温度传感特性.结果表明:Pr^(3+)掺杂优化了Li_(0.9)K_(0.1)NbO_(3):Er^(3+)荧光粉中源自于Er^(3+)离子热耦合能级的双模光学测温性能.本研究为温度探测提供了材料基础和光学测温技术.Photothermal sensing is crucial in developing smart wearable devices.However,designing and synthesizing luminescent materials with suitable multi-wavelength emission and constructing multiple sets of probes in a single material system is a huge challenge for constructing sensitive temperature sensors with a wide temperature range.In this paper,Pr^(3+),Er^(3+)single-doped and double-doped Li_(0.9)K_(0.1)NbO_(3)phosphors are successfully prepared by high temperature solid phase method,and their structures,morphologies,excitation wavelengths and temperature-dependent fluorescence properties are characterized by XRD,SEM,fluorescence spectrometer and self-made heating device.Firstly,the photoluminescences of the synthesized series of samples are investigated.The results show that comparing with the single-doped Li_(0.9)K_(0.1)NbO_(3):Er^(3+)sample,the up/down-conversion spectra of Pr^(3+),Er^(3+)co-doped phosphors under 808 nm/380 nm excitation show that the green fluorescence emission of Er^(3+)is enhanced.In addition,under 980 nm excitation,Pr^(3+)can effectively regulate the fluorescence energy level population pathway,so that the electrons are more effectively arranged in the 2H11/2 and 4S3/2 energy levels in the excitation process.The red emission is weakened and the green emission is enhanced,which improves the signal resolution of the fluorescent material and has a significant influence on the optical temperature measurement.Secondly,the up-conversion fluorescence property of Er^(3+)under 808 nm/980 nm laser excitation in Li_(0.9)K_(0.1)NbO_(3):Er^(3+)and Li_(0.9)K_(0.1)NbO_(3):Pr^(3+),Er^(3+)phosphors are investigated.The results show that the red and green fluorescence emissions of Er^(3+)are two-photon processes.Finally,the up/down-conversion dual-mode temperature sensing properties of Er^(3+)in Li_(0.9)K_(0.1)NbO_(3):Er^(3+)and Li0.9K0.1 NbO_(3):Pr^(3+),Er^(3+)phosphors are investigated.It is found that both materials have good optical temperature measurement performances.The Pr^(3+)doping optimizes the dua

关 键 词：铌酸盐 上/下转换 多波长 温度探测 

分 类 号：TQ422[化学工程]