First-principles determination of defect energy levels through hybrid density functionals and GW

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Wei Chen, Alfredo Pasquarello

Abstract

In this topical review, we discuss recent progress in electronic-structure methods for calculating defect energy levels in semiconductors and insulators. We concentrate mainly on two advanced electronic-structure schemes, namely hybrid density functional theory and many-body perturbation theory in the GW approximation. These two schemes go beyond standard density functional theory in the semilocal approximation providing a more realistic description of band gaps. In particular, we address important aspects underlying the GW scheme and highlight the correspondence between the defect levels as obtained in the various schemes. We further assess the quality of the band-edge positions determined with hybrid functionals and GW through the calculation of band-offsets at semiconductor heterojunctions and of ionization potentials at semiconductor surfaces.

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Citations

Jul 30, 2019·Frontiers in Chemistry·Dorothea GolzePatrick Rinke
Mar 20, 2020·Scientific Reports·Jeongwoon HwangKyeongjae Cho
Dec 22, 2017·The Journal of Physical Chemistry Letters·Christopher LinderälvPaul Erhart

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