物理学报2023，Vol.72Issue(24)：51-61,11.DOI:10.7498/aps.72.20231170
Pr3+共掺杂调控的Li0.9K0.1NbO3:Er3+荧光粉上/下转换双模式光学测温研究
Dual-mode up/down-conversion optical thermometry of Pr3+-regulated Li0.9K0.1NbO3:Er3+phosphors
摘要
Abstract
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,Pr3+,Er3+single-doped and double-doped Li0.9K0.1NbO3 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 Li0.9K0.1NbO3:Er3+sample,the up/down-conversion spectra of Pr3+,Er3+co-doped phosphors under 808 nm/380 nm excitation show that the green fluorescence emission of Er3+is enhanced.In addition,under 980 nm excitation,Pr3+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 Er3+under 808 nm/980 nm laser excitation in Li0.9K0.1NbO3:Er3+and Li0.9K0.1NbO3:Pr3+,Er3+phosphors are investigated.The results show that the red and green fluorescence emissions of Er3+are two-photon processes.Finally,the up/down-conversion dual-mode temperature sensing properties of Er3+in Li0.9K0.1NbO3:Er3+and Li0.9K0.1 NbO3:Pr3+,Er3+phosphors are investigated.It is found that both materials have good optical temperature measurement performances.The Pr3+doping optimizes the dual-mode optical temperature measurement performances of Li0.9K0.1NbO3:Er3+phosphors derived from the thermal coupling energy level of Er3+ions.In addition,the up/down-conversion fluorescence mechanism of Li0.9K01NbO3∶Er3+and Li0.9K0.1NbO3∶Er3+,Pr3+phosphors are proposed,and the enhanced green fluorescence by Pr3+co-doping is attributed to the energy transfer from Pr3+ions to Er3+ions,leading to the increase of green fluorescence level population and the decrease of red fluorescence level population of the Er3+ions.This new dual-mode optical temperature measurement material provides a material basis and optical temperature measurement technology for exploring other temperature measurement materials.关键词
铌酸盐/上/下转换/多波长/温度探测Key words
niobate/up/down-conversion/multi-wavelength/temperature detection引用本文复制引用
贾朝阳,杨雪,王志刚,柴瑞鹏,庞庆,张翔宇,高当丽..Pr3+共掺杂调控的Li0.9K0.1NbO3:Er3+荧光粉上/下转换双模式光学测温研究[J].物理学报,2023,72(24):51-61,11.基金项目
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)和中央高校基本科研业务费专项资金(批准号:300102120101)资助的课题.Project supported by the National Natural Science Foundation of China(Grant Nos.11604253,51672208),the Key Science and Technology Innovation Team of Shaanxi Province,China(Grant No.2022TD-34),and the Fundamental Research Funds for the Central Universities,China(Grant No.300102120101). （批准号:11604253,51672208）
