Used as a high-performance hole-transporting material in organic light-emitting diodes (OLEDs), particularly in blue-emitting devices where efficient and stable charge transport is critical. Its spirobifluorene-based structure provides excellent thermal stability and high glass transition temperature, reducing device degradation under operation. The compound’s twisted molecular architecture helps suppress intermolecular interactions that can lead to excimer formation, thereby maintaining color purity. It is also employed in perovskite solar cells to enhance device efficiency and longevity due to its favorable energy level alignment and film-forming properties. Commonly found in research and development of next-generation displays and solid-state lighting.