Used as a key intermediate in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions for the construction of conjugated organic materials. It plays an important role in the development of organic semiconductors, OLEDs (organic light-emitting diodes), and small molecule or polymer-based optoelectronic devices. Its boronate ester groups enable efficient carbon-carbon bond formation, making it valuable for extending π-conjugation in advanced materials. Commonly employed in the synthesis of hole-transport materials and blue-emitting layers due to the carbazole core’s high triplet energy and good charge transport properties.