The Excited State and Charge Transfer of Two Nonfullerene Acceptors from First-Principles Many-Body Green’s Function Theory

Figure 4

The optical absorption spectra calculated by full-BSE. (a) The spectrum of BTP-IC molecule calculated with the e–h interaction (dark solid line) or without e–h interaction (red solid line). (b) The spectrum of BTP-IS molecule. (c) The spectra comparison of BTP-IC (blue solid line) and BTP-IS (green solid line) molecules.

(a)

(b)

(c)