Pentacene is a polycyclic aromatic hydrocarbon compound commonly used in organic electronics and semiconductor research. It has five linearly-fused benzene rings, giving it a long and flat structure that allows for efficient charge transport. Pentacene is known for its high electron mobility and is used in organic field-effect transistors (OFETs), organic photovoltaic cells, and organic light-emitting diodes (OLEDs). Researchers study pentacene and its derivatives to explore ways to enhance its electronic properties, improve device performance, and develop new applications in flexible and low-cost electronics.