Used primarily in organic electronics, this compound is a key material in the fabrication of organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs). Its phosphonic acid group enables strong anchoring to metal oxide surfaces, enhancing the efficiency and stability of these devices. Additionally, it serves as an effective interfacial layer to improve charge injection and transport in electronic components. Its carbazole moiety contributes to hole-transport properties, making it valuable in the development of high-performance optoelectronic devices.