While the S1-S0 oscillator strength is very low for m = 1 and m = 2, it increases monotonously with m and becomes substantial for m > 3. Asymmetric distribution of the heteroatoms perpendicular to the main axis significantly enhances the S1-S0 oscillator strength. Interestingly, Pu et al. found the opposite trend in their study BxNy ribbons which exhibit a lower density of B,N heteroatoms. Overall, the B,N-GRs scrutinized herein combine very small (positive or negative) S1-T1 energy gaps with appreciable S1-S0 oscillator strengths and with high rigidity. Due to the tunability of their photophysical properties over a wide range, B,N-GRs appear as promising candidates for the further optimization of the performance of OLEDs.