Used as a key intermediate in the synthesis of organic semiconductors and hole-transport materials for optoelectronic devices. Commonly applied in organic light-emitting diodes (OLEDs) and perovskite solar cells due to its excellent thermal stability and ability to facilitate efficient charge transport. Its bulky dibutylfluorene structure helps suppress molecular aggregation, enhancing device performance and longevity. Also employed in the development of fluorescent sensors and dyes where stable amine-functionalized aromatic frameworks are required.