Used primarily as a hole-transporting and host material in organic light-emitting diodes (OLEDs), especially in blue and phosphorescent devices. Its high triplet energy and good thermal stability make it suitable for enhancing device efficiency and longevity. Commonly found in emissive layers where it helps transport positive charges while preventing exciton quenching. Also employed in perovskite solar cells as a hole-transport layer due to its favorable energy level alignment and film-forming properties. Additionally, it serves as a starting material in the synthesis of complex carbazole compounds for research in optoelectronic materials.