Enabling efficient NIR-II luminescence in lithium-sublattice core–shell nanocrystals towards Stark sublevel based nanothermometry

作     者：Songbin Liu Zhengce An Jinshu Huang Bo Zhou Songbin Liu;Zhengce An;Jinshu Huang;Bo Zhou

作者机构：National Rare Earth Functional Material Innovation CenterKey Laboratory of Rare Earth Luminescence Materials and Devices of Jiangxi ProvinceCollege of Rare EarthsJiangxi University of Science and TechnologyGanzhou 341000China State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSouth China University of TechnologyGuangzhou 510641China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第1期

页      面：1626-1633页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：This work is supported by the National Natural Science Foundation of China(Nos.51972119 and 52272151) the Research Project of Education Department of Jiangxi Province(No.GJJ210846) the Doctoral Scientific Research Foundation of Jiangxi University of Science and Technology(No.205200100554). 

主　　题：NIR-II lanthanides core-shell nanostructure Stark splitting nanothermometry 

摘      要：The luminescence in the second near-infrared(NIR-II)spectral region(1,000–1,700 nm)has recently attracted great attention for emerging biological applications owing to its merit of deep tissue bioimaging and high spatiotemporal resolution.However,it still remains a challenge to achieve the highly efficient NIR-II emissions of lanthanides in nanomaterials.Herein,we report an ideal design of sensitizing lithium sublattice core–shell nanocrystals for efficient NIR-II emission properties from a set of lanthanide emitters including Er3+,Tm3+,Ho3+,Pr3+,and Nd3+.In particular,the typical NIR-II emission of Er3+at 1.5μm was greatly enhanced by further manipulating the energy transfer via Er3+–Ce3+cross-relaxation,and the quantum yield can reach up to 35.74%under 980 nm excitation(12.5 W·cm−2),which is the highest value to the best of our knowledge.The 808 nm responsive efficient NIR-II emission was also enabled at the single-particle level through rational core–shell–shell structure design.Moreover,the lithium-sublattice provides an obvious spectral Stark-splitting feature,which can be used in the ultrasensitive NIR-II nanothermometer with relative sensitivity of 0.248%K−1 and excellent thermal cycling stability.These results open a door to the research of new kinds of efficient NIR-II luminescent materials,showing great promise in various frontier fields such as deep tissue nanothermometry and in vivo bioimaging.