Figure 4
From: Exciton binding energy and hydrogenic Rydberg series in layered ReS2
The photoluminescence and photoluminescence excitation spectra of bulk ReS2 recorded at T = 1.8 K. (a) The 113° PL spectrum. The energy regions of detection and excitation of PLE signal are marked by dotted lines and arrows, respectively. (b) The 113° PLE signal plotted as a color map. Red and blue color indicate high and low intensity, respectively. (c) The 113° PL spectrum presented in the energy region of PLE signal.
