Used in organic light-emitting diodes (OLEDs) as a key component in emissive and host materials due to its excellent thermal stability and hole-transport properties. Its rigid, planar structure enhances electron delocalization, improving device efficiency and longevity. Commonly employed in blue-emitting OLEDs for display technologies and solid-state lighting. Also explored in perovskite solar cells as a hole-transport layer to boost energy conversion efficiency.