Widely used as a high-performance host material in blue phosphorescent organic light-emitting diodes (PHOLEDs). Its excellent thermal stability and high triplet energy level make it ideal for preventing energy back-transfer and enabling efficient blue emission. Commonly employed in multilayer OLED device architectures, especially in the emissive layer, where it effectively supports blue dopants like iridium complexes. Also valued for its good hole-transport properties, contributing to balanced charge injection and improved device efficiency. Due to its robust molecular structure, it enhances device lifetime and operational stability in display and lighting applications.