Poly(9,9-dioctylfluorenyl-2,7-diyl) end capped with dimethylphenyl is widely used in the field of organic electronics due to its excellent optoelectronic properties. It is commonly employed as an active layer in organic light-emitting diodes (OLEDs) for displays and lighting, offering high efficiency and stability. Additionally, this polymer is utilized in organic photovoltaics (OPVs) to enhance light absorption and charge transport in solar cells. Its ability to form thin, flexible films makes it suitable for use in flexible and wearable electronic devices. Furthermore, it finds applications in sensors and laser technologies due to its strong fluorescence and tunable emission characteristics.