Used in organic electronics, particularly in the development of organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs), due to its spiro structure that enhances thermal stability and film-forming properties. Its rigid, three-dimensional framework helps suppress molecular aggregation, improving device efficiency and lifespan. Commonly employed as a building block in host materials for blue phosphorescent OLEDs, where it supports high triplet energy levels and good charge transport characteristics. Also explored in perovskite solar cells as a component in hole-transport materials for enhanced performance and stability.