Yb+/Er双掺基氟化物晶体上转换发光 能力的快速实验判别

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中图分类号：O493.3文献标志码：A

Abstract： In order to quickly identify the upconversion luminescence ability of rare earth doped crystal materials， Yb3+/Er3+ co-doped MLuxFy 0 M=Li ，Na， K，Rb， or Cs;x=1，y=4 or x=2，y=7 ） crystal materials were designed and then synthesized using a liquid-solid transfer method.The materials were characterized by using X-ray diffaction， transmission electron microscope， Raman spectroscopy，and fluorescence spectrophotometer. The results indicated that green and red upconversion luminescence of Yb3+/Er3+ co-doped MLuxFy submicron/nanocrystals were obtained under a 980nm laser excitation， whereas these submicron/nanocrystals differed from one another in their ability to give out upconversion luminescence. In the experiment， a pump power threshold （PPT） was used to quickly distinguish the diference in upconversion luminescence ability of Yb3+/Er3+ co-doped MLuxFy submicron/nanocrystals. According to analysis， it is found that there is a correlationbetween the PPTand the maximum phonon energiesof Yb3+/Er3+ co-doped MLuxFy （20 submicron/nanocrystals. Therefore， in the screening of rare earth doped upconversion luminescent crystal materials， the PPT can be used to quickly identify their upconversion luminescent ability.

Keywords： upconversion luminescence; Yb3+/Er3+ co-doped; maximum phonon energy; fluoride; multi-phonon relaxation

引言

近年来，国内外许多团队已采用上转换纳米材料作为生物荧光探针，在肿瘤等恶性疾病的诊断和治疗方面开展了广泛的研究[1-8]。（剩余14821字）