Therefore, the electronic transition of (BN)4C10 corresponding to S0→S7 belongs to localized excitation. We further conducted hole-electron analysis on the B, C, and N atoms in (BN)4C10 to quantitatively elucidate the contribution of each element, and presented the results in the form of a heat map in Figure (c). Both hole and electron are calculated to be concentrated mainly on C atoms, accounting for 82.5% and 76.1% of the total, respectively. In addition, N atoms and B atoms contribute 12.9% and 20.2% of the shares respectively to holes and electrons.