9-Carbazoleethanol is an organic compound featuring a carbazole moiety linked to an ethanol group. The carbazole unit is a classic electron-rich heterocyclic aromatic system, making this molecule a valuable functionalized building block. Its primary and most significant application is in the field of organic electronics and photonics. It serves as a key precursor for the synthesis of hole-transporting materials (HTMs), host materials, and emitters used in organic light-emitting diodes (OLEDs) and other optoelectronic devices. The hydroxyl group provides a versatile handle for further chemical modifications, such as etherification or esterification, to attach various functional groups and tune the material's electronic properties, solubility, and film-forming characteristics. Beyond its role in advanced materials, 9-carbazoleethanol is also utilized as a synthetic intermediate in organic chemistry for constructing more complex carbazole-based structures. It finds use in research and development of photoconductive polymers and as a monomer for functional polymers.