Insight into crystal growth and upconversion luminescence property of tetragonal Ba3Sc2F12 nanocrystals

• 作者: Juan Xie Guang-Chao Zheng Yang-Ming Hu Farhat Nosheen Zhi-Cheng Zhang Er-Jun Liang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 113-122
• 页数: 10页
• 语种: 英文

摘要

Sc-based nanomaterials have attracted consid-erable attention due to their unique optical properties dif-ferent from those of Ln/Y-based nanomaterials.However,studies on Sc-based nanomaterials are far from compre-hensive.Particularly,nanoscale alkaline(Ca,Sr and Ba)scandium fluorides were almost ignored for their stringent synthetic conditions.Herein,we synthesize high-quality tetragonal phase Ba3Sc2F12 nanocrystals with uniform morphology and good dispersibility by carefully tailoring the reaction conditions,such as the molar ratio of reactants,temperature and reaction time.Then,the upconversion(UC)luminescence property of Ba3Sc2F12∶Yb/Er(Ho)samples is investigated in detail.The doping concentrations of sensitizer(Yb3+)and activator(Er3+and Ho3+)are optimized for the strongest UC luminescence,of which the corresponding energy transfer processes are also discussed.Moreover,tetragonal Ba3Sc2F12 nanocrystals can gradually transform into hexagonal Ba4Yb3F17 nanocrystals with the increase in Yb3+doping content.This work provides a novel type of Sc-based nanomaterials with strong red UC emissions which are promising in high-resolution 3-di-mensional color displays,laser,bioimaging and biolabels.