Abstract
Defects and impurities play a fundamental role in semiconductors affecting their mechanical, optical, and electronic properties. Nitrogen (N) impurities are almost always present in a silicon (Si) lattice, either unintentionally, due to the growth and processing procedures, or intentionally, as a result of implantation. Nitrogen forms complexes with intrinsic defects (i.e., vacancies and self-interstitials) as well as with other impurities present in the Si lattice such as oxygen and carbon. It is, therefore, necessary to investigate and understand nitrogen-related defects, especially their structures, their energies, and their interaction with intrinsic point defects and impurities. The present review is focused on nitrogen-related defects (for example Ni, Ns, NiNi, NiNs, NsNs); nitrogen–self-interstitial and nitrogen-vacancy-related complexes (for example NsV, (NiNi)Sii, (NsNs)V); nitrogen–oxygen defects (for example NO, NO2, N2O, N2O2); more extended clusters such as VmN2On (m, n = 1, 2); and nitrogen–carbon defects (for example CiN and CiNO). Both experimental and theoretical investigations are considered as they provide complementary information.
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