High Aspect Ratio Ternary Zn1–xCdxO Nanowires by Electrodeposition for Light-Emitting Diode Applications
High Aspect Ratio Ternary Zn1–xCdxO Nanowires by Electrodeposition for Light-Emitting Diode Applications
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DOI：
10.1021/jp202608e
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发表时间：
2011-07
影响因子：
3.7
通讯作者：
O. Lupan;T. Pauporté;T. L. Bahers;I. Ciofini;B. Viana
中科院分区：
文献类型：
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作者：
O. Lupan;T. Pauporté;T. L. Bahers;I. Ciofini;B. Viana
我们提出了一个实验和计算相结合的方法来研究Zn 1-xCdxO纳米线（NWs）及其集成在发光二极管（LED）结构。在掺氟氧化锡和p-GaN衬底上电沉积了自支撑Zn 1-xCdxO纳米线。研究了其电化学行为，并对反应机理进行了探讨。当CdCl_2浓度低于6 μM时，得到了低维的Zn_（1-x）Cd_xO结构，而当CdCl_2浓度高于6 μM时，由于掺杂了结晶的CdO，线的长径比减小。根据扫描电子显微镜观察，Zn 1-xCdxO纳米线具有更高的纵横比（>30）比纯ZnO纳米线（1020）在类似的条件下生长。分析表明，ZnO掺杂的ZnO纳米线内纳入镉和Cd掺杂增加，增加Cd（II）的沉积浴中的含量。X射线衍射研究表明，增加的晶格参数在镉合金ZnO纳米线。光致发光研究…
We present a combined experimental and computational approach to study Zn1–xCdxO nanowires (NWs) and their integration in light-emitting diode (LED) structures. Self-standing Zn1–xCdxO NWs have been electrodeposited on fluorine-doped tin oxide and p-GaN substrates. The electrochemical behavior has been studied, and the reaction mechanism is discussed. Low-dimensional Zn1–xCdxO structures have been obtained for CdCl2 concentrations in the deposition bath lower than 6 μM whereas at higher concentration it is admixed with crystallized CdO and the aspect ratio of the wires is decreased. According to scanning electron microscopy observations, the Zn1–xCdxO NWs have a higher aspect ratio (>30) than pure ZnO NWs (∼20) grown in similar conditions. Analyses show that the ZnO is doped with cadmium incorporated within ZnO NWs and that Cd doping increases with increasing Cd(II) content in the deposition bath. X-ray diffraction studies show increased lattice parameters in Cd-alloyed ZnO NWs. Photoluminescence studies ...