| ZnO/CuO 核壳结构纳米线光致发光性能与CuO壳层厚度的关系 |
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| 引用本文： | 孟秀清,赵东旭,吴锋民,方允樟,李京波. ZnO/CuO 核壳结构纳米线光致发光性能与CuO壳层厚度的关系[J]. 发光学报, 2012, 33(3): 280-285. DOI: 10.3788/fgxb20123303.0280 |
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| 作者姓名： | 孟秀清 赵东旭 吴锋民 方允樟 李京波 |
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| 作者单位： | 1. 浙江师范大学 LED芯片研发中心, 浙江 金华 321004;2. 发光学与应用国家重点实验室 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033 |
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| 基金项目： | 国家自然科学基金(11104250)资助项目 |
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| 摘 要： | 通过分别生长核层与壳层制备出了ZnO/CuO核壳结构的纳米线。形貌和结构分析表明,ZnO核为单晶纳米线而CuO则以多晶形式覆盖在核层表面上。光致发光(PL)研究表明,ZnO纳米线PL强度随CuO壳层厚度的变化而变化。当壳层比较薄时ZnO的PL强度增大,这主要是由于CuO壳层对ZnO核层的修饰减少了表面态,而当壳层厚度增加到一定程度时,ZnO的PL强度不再变化,这主要是由于在核壳结构中形成了type-I型结构的原因。我们对这一现象做了详细的讨论。
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| 关 键 词： | ZnO/CuO 核壳结构纳米线 光致发光性质 type-I 型结构 |
| 收稿时间： | 2012-01-20 |
Relationship Between Photoluminescence Properties of ZnO/CuO Core/Shell Nanowires and The Thickness of CuO Shells |
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| MENG Xiu-qing,ZHAO Dong-xu,WU Feng-min,FANG Yun-zhang,LI Jing-bo. Relationship Between Photoluminescence Properties of ZnO/CuO Core/Shell Nanowires and The Thickness of CuO Shells[J]. Chinese Journal of Luminescence, 2012, 33(3): 280-285. DOI: 10.3788/fgxb20123303.0280 |
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| Authors: | MENG Xiu-qing ZHAO Dong-xu WU Feng-min FANG Yun-zhang LI Jing-bo |
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| Affiliation: | 1. Research Center for Light Emitting Diodes(LED), Zhejiang Normal University, Jinhua 321004, China;2. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130033, China |
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| Abstract: | ZnO/CuO one-dimensional core/shell nanowires have been synthesized by sequential growth of core and shell,respectively.Phase and structural analyses reveal that the ZnO core has single crystalline phase whereas the CuO shell has polycrystalline phase covering on the surface of the core.The photoluminescence(PL) properties of ZnO nanowires change with the CuO shell thickness.The photoluminescence intensity increases when the shell is very thin,which is attributed to the surface modification by CuO shell.When the shell gets thicker,the intensity of the photoluminescence does not change any more because a type-I band alignment is formed between the core and shell.The experimental result is discussed. |
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| Keywords: | ZnO/CuO core/shell nanowires photoluminescence properties type-I band alignment |
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