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NaGdF4∶Yb^3＋,Ho^3＋与GdF3∶Yb^3＋,Ho^3＋纳米材料的合成、形貌控制与发光性质
  • ISSN号：1000-7032
  • 期刊名称：《发光学报》
  • 时间：0
  • 分类：O482.31[理学—固体物理;理学—物理]
  • 作者机构：[1]中国科学院激发态重点实验室长春光学精密机械与物理研究所,吉林长春130033, [2]中国科学院研究生院,北京100039
  • 相关基金：国家自然科学基金（10834006,10774141,10904141,10904140）; 国家科技部（2006CB601104）; 吉林省科技发展计划（20090134,20090524）; 中国科学院创新项目资助
作者： 曹健[1,2], 张霞[1], 郝振东[1], 张家骅[1]
关键词： NaGdF4∶Yb3+, Ho3+, GdF3∶Yb3+, Ho3+, 形貌控制, 上转换发光, NaGdF4∶Yb3＋, Ho3＋, GdF3∶Yb3＋, Ho3＋, morphology controlled, upconversion emission
中文摘要：

采用水热法通过调控n（F-）∶n（Ln3＋）,pH值以及n（Citrate）∶n（Ln）等一系列反应条件,合成了六方相的NaGdF4∶Yb3＋,Ho3＋与GdF3∶Yb3＋,Ho3＋纳米上转换材料,实现了形貌的可控合成。利用X射线粉末衍射（XRD）,场扫描电子显微镜（SEM）以及发光光谱等手段对产物的物相结构、形貌和荧光性质进行了研究。在980 nm光激发下,六方相的NaGdF4∶Yb3＋,Ho3＋与GdF3∶Yb3＋,Ho3＋样品均显示出绿光（541 nm）和红光（647 nm）发射,分别来自于Ho3＋的5F4,5S2→5I8和5F5→5I8的跃迁。结果显示NaGdF4∶Yb3＋,Ho3＋六棱柱与六棱片结构的发光远强于GdF3∶Yb3＋,Ho3＋的发光,但在pH=7.0,9.0时生成的NaGdF4∶Yb3＋,Ho3＋球形结构发光效率低于GdF3∶Yb3＋,Ho3＋。这表明六方相NaGdF4∶Yb3＋,Ho3＋不同形貌样品的尺寸与结晶性对发光效率影响很大。

英文摘要：

The up-conversion NaGdF4∶Yb3＋,Ho3＋ and GdF3∶Yb3＋,Ho3＋ nanocrystals were successfully prepared by hydrothermal method.The samples were characterized by X-ray powder diffraction（XRD）,scanning electron microscopy（SEM） and luminescence spectra.The crystal structure and morphology can be well controlled by adjusting the molar ratio of n（F-）∶n（Ln3＋）,the value of pH and the molar ratio of n（Citrate）∶n（Ln）.The hexagonal NaGdF4∶Yb3＋,Ho3＋ and GdF3∶Yb3＋,Ho3＋ samples exhibit green（541 nm）and red（647 nm）emissions under 980 nm excitation,which are assigned to the transition of 5F4,5S2→5I8 and 5F5→5I8 in Ho3＋,respectively.It was found that the upconversion efficiency of the hexagonal prism and flake NaGdF4∶Yb3＋,Ho3＋ samples are much stronger than that of GdF3∶Yb3＋,Ho3＋ samples,but the spherical NaGdF4∶Yb3＋,Ho3＋ samples are weaker than GdF3∶Yb3＋,Ho3＋ samples.This indicates that the upconversion efficiency of hexagonal NaGdF4∶Yb3＋,Ho3＋ samples are greatly impacted by the different size and crystalline for different morphology.

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期刊信息
  • 《发光学报》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会发光分会 中国科学院长春光学精密机械与物理研究所
  • 主编：申德振
  • 地址：长春市东南湖大路3888号
  • 邮编：130033
  • 邮箱：fgxbt@126.com
  • 电话：0431-86176862
  • 国际标准刊号：ISSN：1000-7032
  • 国内统一刊号：ISSN：22-1116/O4
  • 邮发代号:12-312
  • 获奖情况:
  • 物理学类核心期刊,2000年获中国科学院优秀期刊二等奖,中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:7320