Used as a key intermediate in organic synthesis, particularly in the preparation of conjugated polymers and small molecule semiconductors for optoelectronic devices. Its bromohexyl chain enables facile alkylation or further functionalization, while the boronate ester groups allow participation in Suzuki-Miyaura cross-coupling reactions. This makes it valuable in constructing donor-acceptor materials for organic solar cells, OLEDs, and field-effect transistors. The carbazole core contributes hole-transport properties and structural rigidity, enhancing thermal stability and film-forming ability in device fabrication.