Used as a key intermediate in the synthesis of organic semiconductors and optoelectronic materials. Commonly applied in the development of OLEDs (organic light-emitting diodes) due to its ability to form stable hole-transport materials when further functionalized. Its bromine site allows for easy cross-coupling reactions, making it valuable in constructing complex conjugated systems for blue-emitting devices. Also employed in the preparation of photovoltaic materials and fluorescent sensors owing to its rigid carbazole core and favorable charge transport properties.