3+</sup>/Er<sup>3+</sup> 雙摻 MLu<sub>x</sub>F<sub>y</sub> (M為L(zhǎng)i、Na、K、Rb或Cs; x=1 ， y=4 或 x=2 ， y=7 )材料體系，使用X射線(xiàn)衍射儀、透射電鏡、拉曼光譜儀和熒光分光光度計(jì)對(duì)材料體系進(jìn)行結(jié)構(gòu)和發(fā)光性能檢測(cè)。實(shí)驗(yàn)結(jié)果表明， Yb<sup>3+</sup>/Er<sup>3+</sup> 雙摻 MLu<sub>x</sub>F<sub>y</sub> 亞微米/納米晶體在 980nm 激光激發(fā)下均可實(shí)現(xiàn)綠色和紅色上轉(zhuǎn)換發(fā)光，但其上轉(zhuǎn)換發(fā)光能力各不相同。實(shí)驗(yàn)中，利用泵浦功率閾值(pump powerthreshold，PPT)快速區(qū)分 Yb<sup>3+</sup>/Er<sup>3+</sup> 雙摻亞微米/納米晶體的上轉(zhuǎn)換發(fā)光能力。通過(guò)分析發(fā)現(xiàn)，PPT與 Yb<sup>3+</sup>/Er<sup>3+</sup> 雙摻亞微米/納米晶體的最大聲子能量之間存在相關(guān)性。因此，在稀土摻雜上轉(zhuǎn)換發(fā)光晶體材料的篩選過(guò)程中，可在發(fā)光性能測(cè)試時(shí)使用PPT，以快速判別其上轉(zhuǎn)換發(fā)光能力。-龍?jiān)雌诳W(wǎng)" />

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Yb+/Er雙摻基氟化物晶體上轉(zhuǎn)換發(fā)光 能力的快速實(shí)驗(yàn)判別

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中圖分類(lèi)號(hào)：O493.3文獻(xiàn)標(biāo)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(lái)，國(guó)內(nèi)外許多團(tuán)隊(duì)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(kāi)展了廣泛的研究[1-8]。（剩余14821字）

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