Synthesis of well oil-dispersible BaYF_5:Yb^(3+)/Er^(3+) nanocrystals with green upconversion fluorescence

Synthesis of well oil-dispersible BaYF_5:Yb^(3+)/Er^(3+) nanocrystals with green upconversion fluorescence

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摘要 Nearly monodisperse,regular-shaped and well oil-dispersible tetragonal BaYF5:0.2Yb3+/0.02Er3+ nanocrystals(NCs) were synthesized in water-ethanol-oleic acid-sodium oleate system.The as-obtained NCs exhibited bright upconversion(UC) fluorescence under the 980 nm excitation.Blue(2H9/2-4I15/2),green((2H11/2,4S3/2)-4I15/2) and red(4F9/2-4I15/2) transitions were observed.The results indicated that the relative intensity of green to red increased gradually with increasing power density,which were seldom in the previous work.Therefore,the UC properties and mechanism were studied in detail. Nearly monodisperse,regular-shaped and well oil-dispersible tetragonal BaYF5:0.2Yb3+/0.02Er3+ nanocrystals(NCs) were synthesized in water-ethanol-oleic acid-sodium oleate system.The as-obtained NCs exhibited bright upconversion(UC) fluorescence under the 980 nm excitation.Blue(2H9/2-4I15/2),green((2H11/2,4S3/2)-4I15/2) and red(4F9/2-4I15/2) transitions were observed.The results indicated that the relative intensity of green to red increased gradually with increasing power density,which were seldom in the previous work.Therefore,the UC properties and mechanism were studied in detail.

作者孙家跃先建波夏志国杜海燕

机构地区 College of Chemistry and Environmental Engineering School of Materials Sciences and Technology

出处《Journal of Rare Earths》 SCIE EI CAS CSCD 2010年第S1期219-221,共3页 稀土学报（英文版）

基金 Project supported by the National Natural Science Foundations of China (20876002,20976002) Natural Science Foundation of Beijing (2082009,2091002) Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality

关键词 oil-dispersible NANOCRYSTALS UPCONVERSION rare earths oil-dispersible nanocrystals upconversion rare earths

分类号 TB383.1 [一般工业技术—材料科学与工程]

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Synthesis of well oil-dispersible BaYF_5:Yb^(3+)/Er^(3+) nanocrystals with green upconversion fluorescence

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