Covalent photofunctionalization and electronic repair of 2H-MoS2via nitrogen incorporation
Literature Information
Helena Osthues, Christian Schwermann, Johann A. Preuß, Thorsten Deilmann, Rudolf Bratschitsch, Michael Rohlfing, Nikos L. Doltsinis
A route towards covalent functionalization of chemically inert 2H-MoS2 exploiting sulfur vacancies is explored by means of (TD)DFT and GW/BSE calculations. Functionalization via nitrogen incorporation at sulfur vacancies is shown to result in more stable covalent binding than via thiol incorporation. In this way, defective monolayer MoS2 is repaired and the quasiparticle band structure as well as the remarkable optical properties of pristine MoS2 are restored. Hence, defect-free functionalization with various molecules is possible. Our results for covalently attached azobenzene, as a prominent photo-switch, pave the way to create photoresponsive two-dimensional (2D) materials.
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