摘要
采用共沉淀法制备了一系列六方相NaYF_(4)∶Yb^(3+)/Nd^(3+)纳米粒子。在980 nm激光激发下,观测到峰值分别位于752 nm、804 nm和862 nm的近红外第一生物窗口发光,分别对应于Nd^(3+)的^(4)F_(7/2)→^(4)I_(9/2)、^(4)F_(5/2)→^(4)I_(9/2)以及^(4)F_(3/2)→^(4)I_(9/2)辐射跃迁。特别是,Nd^(3+)的上述近红外发光展现出优异的热增强发光性质,其中752 nm发光峰在温度从室温升至443 K时增强倍数达到83.7倍。采用发光强度比系统研究了303 K~443 K温度范围内Nd^(3+)的温度传感性能,研究发现采用752 nm和862 nm的发射峰强度比,最大相对灵敏度达到3.07%K^(-1)(303 K)。上述研究结果表明,NaYF_(4)∶Yb^(3+)/Nd^(3+)纳米粒子是一种具有较大潜力的温度传感材料。
A series of NaYF_(4)∶Yb^(3+)/Nd^(3+)nanoparticles were synthesized by coprecipitation method.The near-infrared emissions within the first biological window with peaks at 752,804 and 862 nm were recorded under 980 nm excitation,corresponding to the^(4)F_(7/2)→^(4)I_(9/2),^(4)F_(5/2)→^(4)I_(9/2),and^(4)F_(3/2)→^(4)I_(9/2)transitions of Nd^(3+),respectively.In particular,the luminescence of Nd^(3+)shows a rapid increase with lifting the temperature instead of thermal quenching.For instance,the 752 nm emission recorded at 443 K is 83.7 times higher than that at 303 K.The temperature sensing property was investigated by using the luminescence intensity ratio of Nd^(3+)emissions,showing relative sensitivity up to 3.07%K^(-1)(303 K).All experiment results indicate that NaYF_(4)∶Yb^(3+)/Nd^(3+)nanoparticles are an ideal candidate for temperature sensing materials.
作者
阎龙
刘惠明
蔡致远
周博
YAN Long;LIU Hui-ming;CAI Zhi-yuan;ZHOU Bo(State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510641,China)
出处
《稀土》
CAS
CSCD
北大核心
2023年第1期140-147,共8页
Chinese Rare Earths
基金
国家自然科学基金项目(51972119)
关键词
发光强度比
热耦合能级
温度传感
近红外发光
能量传递
luminescence intensity ratio
thermal coupling levels
temperature sensing
near-infrared luminescence
energy transfer
作者简介
阎龙(1991-),甘肃兰州人,博士后,主要从事上转换纳米发光材料研究,E-mail:yanlong@scut.edu.cn;通讯作者:周博,教授、博士生导师,E-mail:zhoubo@scut.edu.cn
