Used as a key intermediate in organic semiconductor materials, particularly in the synthesis of conjugated polymers and small molecules for optoelectronic devices. Its amino groups enable polymerization reactions, making it valuable in the development of organic light-emitting diodes (OLEDs) and field-effect transistors (OFETs). The bulky di-n-octylfluorene core enhances solubility and film-forming properties, which supports solution-processing techniques in device fabrication. Also employed in research for blue-emitting materials due to its favorable electronic structure and thermal stability.