Poly-TPD is widely used in the field of organic electronics, particularly in the fabrication of organic light-emitting diodes (OLEDs). Its excellent hole-transporting properties make it a key material in the development of efficient and stable OLED devices. It is often employed as a hole transport layer (HTL) to improve charge carrier mobility and enhance device performance. Additionally, Poly-TPD is utilized in organic photovoltaic (OPV) cells, where it aids in optimizing charge separation and transport, contributing to higher energy conversion efficiencies. Its compatibility with solution-processing techniques also makes it a preferred choice for flexible and large-area electronic applications.