Which type of semiconductor can be used as a current rectifier?

A diode is a type of semiconductor device specifically designed to allow current to flow in one direction while blocking it in the opposite direction. This unidirectional current flow is essential for rectifying alternating current (AC) into direct current (DC), making diodes an ideal choice for current rectification in various electrical and electronic applications.

Transistors, field-effect transistors (FETs), and triacs serve different purposes in electronic circuits. Transistors are primarily used for amplification and switching; FETs are used for their high input impedance and low power loss characteristics, often in switching and amplification roles; and triacs are utilized for controlling AC power in applications such as light dimmers and speed controls. While they can have rectifying capabilities in certain configurations, their primary functions differ, making them less suitable than diodes for straightforward rectification tasks.