Used in organic light-emitting diodes (OLEDs) as an intermediate for hole-transport materials due to its stable carbazole backbone and iodine functional group that enables further coupling reactions. Commonly employed in the synthesis of conjugated polymers and small molecules for blue-emitting layers in display technologies. Also utilized in photovoltaic cells as a building block for donor materials in organic solar cells. Its planar structure and electron-donating properties enhance charge carrier mobility in thin-film devices.