Used as a key intermediate in the synthesis of organic semiconductors and optoelectronic materials. Its rigid, twisted fluorene backbone enhances thermal stability and prevents aggregation in solid-state devices. Commonly employed in the production of OLEDs (organic light-emitting diodes) and OFETs (organic field-effect transistors) due to its favorable charge transport properties. Also serves as a building block in the development of high-performance polymers and dendrimers for photovoltaic applications.