Large-Scale and Reversible Synthesis of Bright Upconversion Crystals with Almost 100%Yield by a Minimalist Method for Recyclable Application  

作　　者：Pengpeng Lei Yuan Liang Pengye Du Yong Zhang Hongjie Zhang 

机构地区：[1]State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022 [2]University of Science and Technology of China,Hefei 230026 [3]Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341000 [4]Department of Biomedical Engineering,Faculty of Engineering,National University of Singapore,Singapore 117583 [5]Department of Chemistry,Tsinghua University,Beijing 100084

出　　处：《CCS Chemistry》2024年第6期1512-1522,共11页中国化学会会刊（英文）

基　　金：supported by financial aid from the National Natural Science Foundation of China(grant nos.22020102003 and 21834007);the Jilin Province Youth Science and Technology Talent support project(grant no.QT202229);the Program of Science and Technology Development Plan of Jilin Province of China(grant no.YDZJ202302CXJD065).

摘　　要：Upconversion luminescence(UCL)materials have the potential for many applications due to their unique optical properties.Some technical challenges such as complex synthesis with low yield and nondegradability need to be addressed for practical use.Here,we report for the first time a minimalist method for large-scale synthesis of Cs_(2)NaErCl_(6)UCL crystals with almost 100%yield,simply by dissolving metal chlorides in water and then drying,referred to as the“dissolve-dry”method.Cs_(2)NaErCl_(6)crystals produced under such mild conditions exhibited bright UCL at either 808 or 980 nm irradiation.UCL was achieved through an excited state absorption process,and the excellent performance was mainly attributed to the large unit cells of the crystals and the long lifetime of Er^(3+)excited energy levels.Moreover,the synthesis was reversible and could be scaled up unlimitedly,making it suitable for industrial applications,with recyclable products.The recyclable application of Cs_(2)NaErCl_(6)crystals as a luminescent medium in near-infrared light-emitting diode excitable upconversion devices was demonstrated based on its excellent recyclability.Our work not only provides a new strategy for large-scale synthesis of UCL crystals but also demonstrates the recyclability of this material and its related applications.

关 键 词：rare earth UPCONVERSION reversible synthesis minimalist method APPLICATION 

分 类 号：O62[理学—有机化学]