Tris(4-biphenylyl)amine is widely used in the field of organic electronics, particularly in the development of organic light-emitting diodes (OLEDs). Its excellent hole-transporting properties make it a key component in the fabrication of efficient and stable OLED devices. The compound is often employed as a hole-transport layer, facilitating the movement of positive charges within the device, which enhances overall performance and longevity. Additionally, it is utilized in organic photovoltaics (OPVs) to improve charge carrier mobility and device efficiency. Its ability to form stable amorphous films further contributes to its application in flexible and high-performance electronic displays. Researchers also explore its potential in other optoelectronic applications, such as sensors and transistors, due to its favorable electronic properties and thermal stability.