Resumo: Two-dimensional (2D) materials have triggered intense research attention for potential applications in optoelectronics, in general, and in solar energy harvesting, in particular. This is due to 2D materials properties such as their high optical absorption, tunable band gaps and flexibility. Also the possibility to make 2Dmaterials ultrathin heterostructures is considered highly advantageous for Photo voltaic (PV) applications. I will discuss some recent works concerning 2D materia ls for PV applications and present a few results of GW+BSE calculations applied to transition metal dichalcogenide bulk materials.

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