Fig. 8: PL spectrum for the excitonic and trion contributions. | npj 2D Materials and Applications

Fig. 8: PL spectrum for the excitonic and trion contributions.

From: Brightening dark excitons and trions in systems with a Mexican-hat energy dispersion: example of InSe

Fig. 8

(Left column) compares the exciton (red) and negative trion (blue) in the electron-doped system. (Right column) compares the exciton (red) and positive trion (black) in the hole-doped system. Each row shows how the spectra evolve through temperatures T = 5, 150, and 300 K. The peak positions slowly change with temperature; this is purely the effect of the dark states. The peaks on the LHS of each pair correspond to the dark (virtual bright) state, and the RHS peak corresponds to the direct PL peak.

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