Investigation of nanoscale voids in Sb-doped p-type ZnO nanowires
Investigation of nanoscale voids in Sb-doped p-type ZnO nanowires
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DOI：
10.1088/1361-6528/aac8c8
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发表时间：
2018-06
期刊：
影响因子：
3.5
通讯作者：
K. Pradel;Jun Uzuhashi;T. Takei;T. Ohkubo;K. Hono;N. Fukata
中科院分区：
文献类型：
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作者：
K. Pradel;Jun Uzuhashi;T. Takei;T. Ohkubo;K. Hono;N. Fukata
尽管氧化锌具有多种优良的光电和压电性能，但由于缺乏稳定的p型掺杂剂，其应用一直受到限制。最近，人们发现在氧化锌中掺锑可以导致稳定的p型掺杂，但掺杂过程中一个奇怪的副作用是在纳米线内部形成空洞。虽然以前被用作成功使用兴奋剂的标志，但到目前为止，对这些结构本身的研究很少。用透射电子显微镜和X射线衍射仪研究了退火对空洞尺寸和微观结构的影响，发现空洞是在锌锑氧化物的周围形成的。此外，利用拉曼光谱还发现了一个与成功掺杂有关的新峰。然而，最令人惊讶的发现是纳米线中存在困住的水，这表明这实际上是一种复合结构。水最初是通过原子探针层析技术在纳米线中发现的，并通过拉曼光谱进行了验证。
While it has multiple advantageous optoelectronic and piezoelectric properties, the application of zinc oxide has been limited by the lack of a stable p-type dopant. Recently, it was discovered that antimony doping can lead to stable p-type doping in ZnO, but one curious side effect of the doping process is the formation of voids inside the nanowire. While previously used as a signifier of successful doping, up until now, little research has been performed on these structures themselves. In this work, the effect of annealing on the size and microstructure of the voids was investigated using TEM and XRD, finding that the voids form around a region of Zn7Sb2O12. Furthermore, using Raman spectroscopy, a new peak associated with successful doping was identified. The most surprising finding, however, was the presence of water trapped inside the nanowire, showing that this is actually a composite structure. Water was initially discovered in the nanowires using atom probe tomography, and verified using Raman spectroscopy.