Used as a key intermediate in the synthesis of organic semiconductors and optoelectronic materials. Its bromine functionality allows for palladium-catalyzed cross-coupling reactions, enabling the construction of complex conjugated systems. Commonly employed in the development of hole-transport materials for OLEDs and perovskite solar cells due to the stability and electron-donating nature of the carbazole core. The tert-butyl groups enhance solubility and reduce aggregation, improving film quality in device fabrication. Also utilized in the preparation of fluorescent dyes and sensors where extended π-conjugation is required.