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a) PL spectra of a SnS flake and its substrate (excitation photon energy of 2.33 eV at 77 K), b) band structure schematics of layered SnS corresponding to two valleys of close energy gaps in the ΓX and ΓY direction. c) PL spectra under different excitation linear polarization directions. d,e) Angular‐resolved PL intensity of the emission peaks at 1.204 eV (Γ‐X valley) and 1.160 eV (Γ‐Y valley). Reproduced with permission.[ 50 ] Copyright 2018, The American Chemical Society.
