Used as a key intermediate in organic semiconductor materials, particularly in the development of blue-emitting polymers for OLED (organic light-emitting diode) devices. Its rigid spirocyclic structure enhances thermal stability and prevents aggregation, improving device efficiency. Commonly employed in the synthesis of conjugated polymers for display technologies and solid-state lighting. Also explored in perovskite solar cells as a component in hole-transport materials due to its favorable energy level alignment and film-forming properties.