To meet the demands of next-generation ultrahigh-definition displays, the organic light-emitting diodes (OLED) industry is actively pursuing the development of narrowband organic light-emitting materials. Within this effort, multiple resonance thermally activated delayed fluorescence (MR-TADF) materials based on boron-nitrogen fused polycyclic aromatic hydrocarbons have gained prominence for their energy efficiency and color purity, capturing the interest of both academia and industry.