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Effect of GaN/Si(111) template on structural and optical properties of ZnO nanostructures

机译:GaN / Si(111)模板对ZnO纳米结构的结构和光学性质的影响

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Zinc oxide (ZnO) nanostructures are grown on p- and n-GaN/Si(111) by aqueous method in this paper. The structural and optical properties of the nanostructures are characterised by X-ray diffraction, scanning electron microscopy (SEM), atomic force microscopy, micro-Raman and photoluminescence. The results show the distinct appearance of ZnO nanostructures grown on different GaN substrates. The ZnO nanorod array with a hexagonal wurtzite structure is grown on the n-GaN/Si substrate, whereas the film-like structure is shown on p-GaN/Si. The morphology difference is due to the density of threading dislocations in the different doped GaN layers that can affect the ZnO nanorod density. Meanwhile, the ZnO nanostructures grown on n-GaN/Si show superior optical property with lower tensile stress compared with those on p-GaN/Si. The results will provide novel opportunities for the fabrication of hybrid ZnO/GaN optoelectronic devices.
机译:本文采用水法在p-和n-GaN / Si(111)上生长了氧化锌(ZnO)纳米结构。纳米结构的结构和光学性质通过X射线衍射,扫描电子显微镜(SEM),原子力显微镜,显微拉曼和光致发光来表征。结果显示了在不同的GaN衬底上生长的ZnO纳米结构的独特外观。在n-GaN / Si衬底上生长具有六方纤锌矿结构的ZnO纳米棒阵列,而在p-GaN / Si上显示出膜状结构。形态差异是由于不同掺杂的GaN层中的位错的密度会影响ZnO纳米棒的密度。同时,与在p-GaN / Si上相比,在n-GaN / Si上生长的ZnO纳米结构显示出优异的光学性能和较低的拉伸应力。该结果将为混合ZnO / GaN光电器件的制造提供新的机会。

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