Used in organic electronics as a key intermediate for synthesizing hole-transport materials in OLEDs and perovskite solar cells. Its bromobutyl chain allows for easy functionalization, enabling incorporation into polymers or small molecules with tailored electronic properties. Commonly employed in the development of light-emitting diodes and photovoltaic devices due to carbazole’s high triplet energy and good charge transport characteristics. Also explored in the synthesis of crosslinkable materials for multilayer device fabrication, where it helps prevent interlayer mixing during processing.