Used as an intermediate in the synthesis of organic semiconductors and optoelectronic materials. It plays a key role in the preparation of carbazole-based derivatives for applications in organic light-emitting diodes (OLEDs) and perovskite solar cells. Its aldehyde functional group allows for easy modification, enabling the construction of conjugated systems important for charge transport and light emission. Also employed in the development of fluorescent dyes and sensors due to its rigid aromatic structure and favorable photophysical properties.