Growth regularity and phase diagrams of NaLu_(0.795−x)Y_(x)F_(4) upconversion nanocrystals synthesized by automatic nanomaterial synthesizer  

作　　者：Dan Zhang Yanhui Dong Daguang Li Heng Jia Weiping Qin 

机构地区：[1]State Key Laboratory on Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun,130012,China

出　　处：《Nano Research》2021年第12期4760-4767,共8页纳米研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(NSFC)(No.11774132);the Opened Fund of the State Key Laboratory on Integrated Optoelectronics,and Tsinghua National Laboratory for Information Science and Technology(TNList)Cross-discipline Foundation;the Major Science and Technology Tendering Project of Jilin Province(No.20170203012GX).

摘　　要：The growth regularities of nanomaterials are often concealed by the contingency of preparation. Therefore, it is always very difficult to figure out growth regularities of nanomaterials due to the accompanying undulation of products. A series of precise synthesis was performed by using an automatic nanomaterial synthesizer (ANS) in order to explore the growth regularity of complex NaREF4 (RE: rare earth) upconversion nanocrystals (UCNCs). The use of ANS significantly enhances the experimental controllability, repeatability, and success rate. Mass experimental research exhibited that the NaLu_(0.795−x)Y_(x)F_(4):Yb^(3+)/Tm^(3+) (x = 0−0.795) UCNCs can vary their sizes continuously in a wide range to accurately meet the experimenter’s design merely by controlling the concentration of Y^(3+). A notable growth regularity was obtained and intuitively shown in growth phase diagrams. Furthermore, in the case of having excellent monodispersity, pure hexagonal phase, and uniform morphology, the prepared UCNCs still retained superior upconversion luminescent (UCL) properties. The regular changes in UCL properties further confirmed the growth regularity of the UCNCs. After analyzing the experimental data, we found that NaLu_(0.795−x)Y_(x)F_(4) combined the advantages of NaYF_(4) and NaLuF_(4) hosts with desired sizes. These results provide a guidance for the exploration of growth regularities of other similar nanomaterials and also for the structure design of the required nanomaterials.

关 键 词：NaLu_(0.795−x)Y_(x)F_(4) upconversion nanocrystal growth regularity phase diagram automatic nanomaterial synthesizer 

分 类 号：TB383[一般工业技术—材料科学与工程]