Effects of Cr-doping on the photoluminescence and ferromagnetism at room temperature in ZnO nanomaterials prepared by soft chemistry route
Effects of Cr-doping on the photoluminescence and ferromagnetism at room temperature in ZnO nanomaterials prepared by soft chemistry route
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Cr掺杂对软化学路线制备的ZnO纳米材料室温光致发光和铁磁性的影响
DOI：
10.1016/j.matchemphys.2008.07.031
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发表时间：
2009-01
影响因子：
4.6
通讯作者：
Iqbal, Javed
中科院分区：
文献类型：
--
作者：
Wang, Baiqi;Fu, Honggang;Shan, Xudong;Yu, Dapeng;Yu, Ronghai;Huang, Guowei;Iqbal, Javed
采用软化学方法制备了纯ZnO和Cr掺杂ZnO纳米材料。采用X射线衍射（XRD）、透射电子显微镜（TEM）和高分辨透射电子显微镜（HRTEM）对所制备的ZnO纳米材料的结晶度和形貌进行了研究，结果表明Cr掺杂能够影响ZnO纳米材料的结晶，改善ZnO纳米材料的取向生长。利用能谱仪（EDS）和X射线光电子能谱仪（XPS）研究了Cr离子的含量和价态，结果表明Cr离子均匀地掺杂在纳米线中，掺杂量约为2atm%，掺杂ZnO纳米材料中Cr离子以+3价态存在。在室温下研究了Cr掺杂对ZnO纳米材料光致发光和磁性的影响。Cr的掺杂可以调节ZnO纳米材料的能级，增加ZnO纳米材料中的缺陷和氧空位，从而使ZnO纳米材料的紫外（UV）发射峰位置发生偏移，增强了ZnO纳米材料的可见光（VL）发光性能。此外，Cr掺杂的ZnO晶体具有室温铁磁性，这可能与晶体中存在缺陷和氧空位以及Cr 3d和O 2p自旋矩之间的交换作用有关。
The pure and Cr-doped ZnO nanomaterials were prepared by soft chemistry route. The crystallinity and morphology of as-prepared ZnO nanomaterials were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM), which show that Cr-doping could influence crystal and improve the oriented growth of ZnO nanomaterials. The amount of contents and valence state of Cr ions were investigated by energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), which demonstrate that the Cr ions are uniformly doped about 2atm% in each nanowire and are in +3 valence state in doped ZnO nanomaterials. The effect of Cr-doping on the photoluminescence (PL) and magnetic properties of as-prepared ZnO nanomaterials were principally investigated at room temperature. The Cr-doping can adjust the energy level of ZnO nanocrystal and increase the amount of defects and oxygen vacancies, which lead to shift in the emission peak position in ultraviolet (UV) region and enhance the PL performance in visible light (VL) region of ZnO nanomaterials. In addition, the presence of Cr dopant in ZnO structures establishes the room-temperature ferromagnetism, which is possibly related to the existence of defects and oxygen vacancies as well as due to exchange interaction between Cr 3d and O 2p spin moments.
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影响因子：
3.5
作者：
F. Xu;Zhing Yon Yuan;G. Du;T. Ren;C. Volcke;P. Thiry;B. Su
通讯作者：
F. Xu;Zhing Yon Yuan;G. Du;T. Ren;C. Volcke;P. Thiry;B. Su
影响因子：
3.9
作者：
Lili Wu;Y. Wu;Xiaoru Pan;Fanyuan Kong
通讯作者：
Lili Wu;Y. Wu;Xiaoru Pan;Fanyuan Kong
影响因子：
4
作者：
Ling Liu;B. Xiang;Xinzheng Zhang;Y. Zhang;D. Yu
通讯作者：
Ling Liu;B. Xiang;Xinzheng Zhang;Y. Zhang;D. Yu
影响因子：
4
作者：
Cui, JB;Gibson, UJ
通讯作者：
Gibson, UJ
影响因子：
41.2
作者：
Tsukazaki, A;Ohtomo, A;Kawasaki, M
通讯作者：
Kawasaki, M