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Giant excitonic absorption and emission in two-dimensional group-III nitrides

Giant excitonic absorption and emission in two-dimensional group-III nitrides

Abstract Absorption and emission of pristine-like semiconducting monolayers of BN, AlN, GaN, and InN are systematically studied by ab-initio methods. We calculate the absorption spectra for in-plane and out-of-plane light polarization including quasiparticle and excitonic effects. Chemical trends with the cation of the absorption edge and the exciton binding are …