Characterizing the luminescent properties of upconversion nanoparticles in single and densely packed state

作     者：Xiaohu Chen Zhengyu Gui Yong Liang Xin Jin Simin Li Pengjiu Zhao Zhangsen Yu Aiguo Wu Shoupeng Liu Hui Li 

作者机构：Jiangsu Key Laboratory of Medical Optics CAS Center for Excellence in Molecular Cell Science Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of SciencesSuzhou 215163P.R.China Key Laboratory of Magnetic Materials and Devices&Functional Materials and Nanodevices Ningbo Institute of Material Technology&Engineering Chinese Academy of Sciences Ningbo 315201P.R.China Tianjin Guoke Medical Engineering and Technology Development Co.Ltd.Tianjin 300399P.R.China Jiangsu Shuguang Opto-Electronics Co.Ltd.Yangzhou 225009P.R.China 

出 版 物：《Journal of Innovative Optical Health Sciences》 (创新光学健康科学杂志（英文）)

年 卷 期：2019年第12卷第1期

页      面：46-53页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：The work was supported by the National Key Research and Development Program of China(YFC20170110100) the National Natural Science Foundation of China(NSFC)(Grant Nos.61475185 and 11504409) Natural Science Foundation of Tianjin City(TJNSF)(Grant No.16JCYBJC43800).Xiaohu Chen and Zhengyu Gui contributed equality to this work 

主　　题：Upconversion nanoparticles single particles luminescence lifetime rate function 

摘      要：Luminescent properties of Er^(3+)-and Yb^(3+)-co-doped CaF_(2)upconversion nanoparticles(UCNPs)were investigated in single particle and densely-packed states with a custom-built *** single UCNPs exhibit linear dependency of luminescent intensity on excitation power while the densely-packed UCNPs exhibit a 2-order power law-dependency indicating a two-photon absorption ***-domain luminescence intensity measurements were performed and the curves were fitted to excitationnemission rate functions based on a simplified three-state *** results indicate that the intermediates in single particles are much less and saturated in a short time,and there are strong couplings of the ground states and intermediate states between neighboring UCNPs in densely packed UCNPs.