Solvothermal synthesis and luminescence properties of NaYF₄:Ln³⁺ (Eu³⁺, Tb³⁺, Yb³⁺/Er³⁺) nano- and microstructures

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• 作者：Xuesong Qu^a ; ^b ; Guohui Pan^c ; Hyun Kyoung Yang^a ; Yeqing Chen^a ; Jong Won Chung^a ; Byung Kee Moon^a ; Byung Chun Choi^a ; Jung Hyun Jeong^a ; ^{jhjeong@pknu.ac.kr}
• 关键词：Luminescence ; NaYF4 ; Ln3+ ; Solvothermal synthesis
• 刊名：Optical Materials
• 出版年：2012
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：May, 2012
• 卷：34
• 期：7
• 页码：1007-1012
• 文件大小：1178 K

摘要

NaYF₄ and NaYF₄ (Eu³⁺, Tb³⁺, Yb³⁺/Er³⁺) nano- and microstructures were successfully synthesized through a facile and effective polyol-mediated route with ethylene glycol (EG) as solvent. The factors including the molar ratio of F^{鈭?/sup>/Y3+, reaction temperature and reaction time were well studied in the influences on size, morphology and phase transition of samples. The experimental results indicate that the F鈭?/sup>/Y3+ ratio and reaction temperature play key roles in crystal phase and morphology of the product. Higher molar ratio of F鈭?/sup>/Y3+ and higher temperature as well as longer reaction time facilitate 伪 cubic structure-to-尾 hexagonal structure phase transition, which behaves as a dissolution-recrystallization transformation process. Photoluminescence measurements demonstrated that the as-prepared 尾-NaYF₄ is one good up- and down-conversion luminescent host material.}