Yb+/Er雙摻基氟化物晶體上轉(zhuǎn)換發(fā)光 能力的快速實驗判別
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中圖分類號：O493.3文獻標志碼：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
近年來，國內(nèi)外許多團隊已采用上轉(zhuǎn)換納米材料作為生物熒光探針，在腫瘤等惡性疾病的診斷和治療方面開展了廣泛的研究[1-8]。（剩余14821字）