| ZnS：Tb／SiO2核壳结构纳米晶的光学性质 |
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| 引用本文： | 华瑞年,田跃.ZnS：Tb／SiO2核壳结构纳米晶的光学性质[J].大连民族学院学报,2008,10(1):6-9. |
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| 作者姓名： | 华瑞年 田跃 |
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| 作者单位： | 大连民族学院,生命科学学院,辽宁,大连,116605 |
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| 摘 要： | 用微乳液法合成了ZnS：Tb／SiO2核壳结构纳米晶，并通过X射线粉末衍射（XRD）、透射电子显微镜（TEM）、荧光光谱等手段对产物的结构、尺寸、形貌、荧光特性进行了表征。结果表明，ZnS：Tb纳米晶的粒径为3nm，ZnS：Tb／SiO2核壳结构纳米晶的粒径为5nm左右，这样就得出壳的厚度约为1nm。在ZnS：Tb／SiO2核壳结构纳米晶的发射光谱上可以观察到有5个发射峰为460、489、544、584和620nm，分别对应ZnS基质的发光和Tb^3＋离子的^5D4→^7F6、^5D4→^7F5、^5D4→^7F4、^5D4→^7F3跃迁。
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| 关 键 词： | ZnS:Tb/SiO2 核壳结构 XRD 光致发光(PL) |
| 文章编号： | 1009-315X（2008）01-0006-04 |
| 收稿时间： | 2007-07-11 |
| 修稿时间： | 2007年7月11日 |
Optical Properties of ZnS:Tb/SiO2 Core-shell Nanocrystals |
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| HUA Rui-nian,Tian Yue.Optical Properties of ZnS:Tb/SiO2 Core-shell Nanocrystals[J].Journal of Dalian Nationalities University,2008,10(1):6-9. |
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| Authors: | HUA Rui-nian Tian Yue |
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| Institution: | (College of Life Science ,Dalian Nationalities University, Dalian Liaoning 116605, China) |
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| Abstract: | In this work ZnS： Tb/SiO2 core -shell structure nanocrystals were synthesized via microemulsion method. The structure, sizes, morphology and optical properties of final products were characterized by means of X -ray diffraction （XRD）, transition electron microscope （TEM） and photoluminescent spectrum. The results show that ZnS：Tb core nanocrystals diameter is about 3.0nm and ZnS：Zb/SiO2 core - shell structure nanocrystals have 1 nm thick SiO2 shell. The photoluminescence properties of ZnS ： Tb/SiO2 core - shell nanocrystals were also studied. We can observe five emission peaks located at 460,489, 544, 584 and 620 nm, ascribing to luminescence of ZnS host, ^5 D4→^7 F6, ^5 D4→^7 F5, ^5 D4→^7 F4 and ^5 D4→^7 F3 transition of Tb^3＋ ions, respectively. |
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| Keywords: | ZnS:Tb/SiO2 core-shell structure XRD photoluminescence(PL) |
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