Used as a key intermediate in the synthesis of conjugated polymers for organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs). Its bromine functionality allows for palladium-catalyzed cross-coupling reactions, enabling the construction of high-performance semiconducting materials. The fluorene core with bulky octyl side chains enhances solubility and film-forming properties, while promoting blue light emission in OLED devices. Commonly employed in the preparation of polyfluorenes with tailored band gaps and improved thermal stability for use in flexible electronics and display technologies.