Used primarily in organic light-emitting diodes (OLEDs) as an electron-transporting and hole-blocking material. Its rigid molecular structure provides high thermal stability and prevents crystallization in thin films, making it suitable for long-lasting OLED devices. Commonly employed in blue phosphorescent OLEDs to improve efficiency and reduce efficiency roll-off at high brightness. Also serves as a host material for emissive layers, where it helps confine excitons and enhance radiative recombination. Its wide energy bandgap supports high-energy blue emission without energy loss to the host.