We assume the MoS2 sample is n-doped, where the majority carriers are conduction band electrons whose population is modulated by the external power supply. At more positive applied potentials (e.g., 𝐸 =+1.00 V, Fig. ), the "undoped" MoS2 sample consists of a fully occupied valence band and unfilled conduction band. At this undoped condition, the MND model predicts two peaks for the A 0 and A -transitions (dashed and dotted lines in Fig. ). The oscillator strength is mostly associated with the higher energy A 0 transition, as indicated by the thick black line in Fig. . After convolving the calculated A 0 and A -linewidths to account for Gaussian broadening and the instrument response, we obtain a single broad peak at 1.894 eV (solid line in Fig. ). The key point here is that the experimentalist observes a single absorbance peak at positive potentials because the oscillator strength is mostly associated with A 0 at lower 𝑛.