Used as a hole-transporting material in organic light-emitting diodes (OLEDs). It helps improve device efficiency by facilitating the movement of positive charges to the emission layer. Commonly found in blue OLEDs due to its suitable energy levels and thermal stability. Also employed in phosphorescent OLEDs to enhance luminance and operational lifetime. Its rigid molecular structure reduces aggregation and supports amorphous film formation, which is critical for uniform device performance.