Used as a key intermediate in organic light-emitting diodes (OLEDs), particularly in the electron-transport layer due to its high electron mobility and thermal stability. It serves as a building block in the synthesis of conjugated polymers and small molecules for blue-emitting materials in display technologies. Its spirofluorene core enhances morphological stability, reducing device degradation. Commonly employed in solution-processed OLEDs and perovskite solar cells as a dopant-free hole-transport material, improving device efficiency and longevity. Also utilized in cross-coupling reactions, especially Suzuki-Miyaura coupling, to construct complex π-conjugated systems for optoelectronic applications.