Used as a key intermediate in the synthesis of organic semiconductors and optoelectronic materials. Its conjugated structure and functional aldehyde groups allow for easy modification in creating hole-transport materials and light-emitting layers in OLED devices. Also employed in the development of carbazole-based polymers and small molecules for photovoltaic cells due to its good thermal stability and electron-donating properties. Additionally, it serves as a building block in medicinal chemistry for designing bioactive compounds with potential antitumor and antimicrobial activities.