The growth of nanosized columnar Al_xGa_1-xN/AlN heterostructures on the surface of silicon substrates of three types, namely, on a standard atomically smooth c-Si substrate, a Si substrate with a transition layer of porous silicon por-Si/c-Si, and a hybrid a substrate containing a layer of silicon carbide grown by the method of coordinated substitution of atoms on the surface of porous silicon SiC/por-Si/c-Si. The complex structural-spectroscopic analysis carried out showed that the epitaxial growth of the AlN nucleation layer on all types of substrates under N-enriched conditions leads to the formation of Al_xGa_1-xN/AlN heterostructures with a Ga-polar surface. It was found that a layer of an ordered Al_xGa_1-xN solid solution was formed only on the SiC/por-Si/c-Si hybrid substrate. On c-Si and por-Si/c-Si substrates, the Al_xGa_1-xN layer is in the state of a disordered solid solution with an excess content of gallium atoms. It has been demonstrated that Al_xGa_1-xN nanosized columns formed on a SiC/por-Si/c-Si substrate are tilted relative to the c-axis, which is associated with the peculiarities of the formation of the SiC layer by the method of coordinated substitution of atoms on a porous Si substrate, which leads to the formation of inclined (111) SiC facets. at the interface between the (111) Si surface and pores in Si. Optical studies of the grown samples showed that the optical band-to-band transition for the Al_xGa_1-xN solid solution with E_g=3.99 eV was observed only when studying the heterostructure grown on the SiC/por-Si/c-Si substrate. The results obtained in this work demonstrate the promise of using SiC/por-Si/c-Si substrates for the integration of silicon technology and the technology of synthesizing nanosized Al_xGa_1-xN columnar heterostructures by molecular beam epitaxy with nitrogen plasma activation. Keywords: nanosized columnar Al_xGa_1-xN/AlN heterostructures, epitaxial growth, porous silicon, silicon carbide, pliable substrate.

Подсчитывается количество просмотров абстрактов ("html" на диаграммах) и полных версий статей ("pdf"). Просмотры с одинаковых IP-адресов засчитываются, если происходят с интервалом не менее 2-х часов.

Дата начала обработки статистических данных - 27 января 2016 г.