Used as a high-performance host material in blue phosphorescent organic light-emitting diodes (PHOLEDs). Its strong electron-transport properties and high triplet energy level make it ideal for efficient energy transfer to blue emitters, improving device efficiency and stability. Commonly employed in multilayer OLED structures to enhance electron injection and balance charge transport, leading to lower driving voltages and longer operational lifetimes. Also utilized in thermally activated delayed fluorescence (TADF) devices as a host for blue and deep-blue emitters. Its rigid molecular structure contributes to high thermal stability, which is critical for vacuum-deposited OLED fabrication processes.