What is the function of the pn diode?

A PN diode is a semiconductor device that allows current to flow primarily in one direction. It consists of a p-type region (with positive charge carriers, or holes) and an n-type region (with negative charge carriers, or electrons). When forward-biased, the diode conducts current, while in reverse bias, it blocks current flow. This property makes PN diodes essential for rectification, signal modulation, and various electronic applications.