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Yb3+/Tm3+共掺杂的钨酸镉纳米晶发光性能的研究

刘磊 ,  杨魁胜 ,  贺超 ,  司振军

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引用本文: 刘磊, 杨魁胜, 贺超, 司振军. Yb3+/Tm3+共掺杂的钨酸镉纳米晶发光性能的研究[J]. 无机化学学报, 2013, 29(6): 1123-1128. doi: 10.3969/j.issn.1001-4861.2013.00.166 shu
Citation:  LIU Lei, YANG Kui-Sheng, HE Chao, SI Zhen-Jun. Research on Luminescence Properties of CdWO4:Yb3+/Tm3+[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(6): 1123-1128. doi: 10.3969/j.issn.1001-4861.2013.00.166 shu

Yb3+/Tm3+共掺杂的钨酸镉纳米晶发光性能的研究

  • 基金项目:

    国家自然科学基金青年科学基金(No.20901011) (No.20901011)

    长春市科技局课题(No.20091510)资助项目。 (No.20091510)

摘要: 本文采用水热法制备了稀土离子Yb3+/Tm3+共掺杂的钨酸镉纳米晶。运用X-射线粉末衍射、场发射环境扫描电子显微镜和光谱分析对制备的样品的结构和发光性能进行了表征。根据XRD图谱可知,钨酸镉为单斜晶系,晶粒平均尺寸在28 nm左右。从ESEM图片可明显看出,钨酸镉呈纳米棒结构,直径在30 nm左右,长径比在5～8之间。利用980 nm半导体激光器激发钨酸镉纳米晶得到样品的发射光谱,存在一个较强的蓝光发射,发光峰位于481 nm,对应于Tm3+的1G4→3H6能级的跃迁,分析了Tm3+/Yb3+离子共掺体系的发光机制。讨论了发光强度随稀土离子浓度的变化,当Tm3+离子的掺杂浓度在2mol%,Yb3+/Tm3+物质的量浓度比cTm3+/cYb3+=10时钨酸镉纳米晶的发光强度最强。根据泵浦功率与发光强度之间的关系,可知处于481 nm的蓝光发射属于三光子过程,由发光强度与掺杂浓度之间的双对数衰减曲线可知,引起蓝光发射源于Tm3+的电偶极跃迁。

English

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  • 收稿日期:  2012-12-25
  • 网络出版日期:  2013-01-25
通讯作者: 陈斌, bchen63@163.com
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