Used as a key intermediate in the synthesis of organic semiconductors and electroactive polymers. Commonly employed in the development of hole-transport materials for OLEDs and perovskite solar cells due to its strong electron-donating properties. Also serves as a building block for fluorescent dyes and sensors, especially in detecting metal ions and biomolecules. Its rigid carbazole core enhances thermal stability and charge mobility in thin-film devices. Additionally, utilized in photoconductors and electrophotographic materials for imaging applications.