Which semiconductor component has an emitter electrode?

The semiconductor component that features an emitter electrode is the bipolar transistor. Bipolar transistors have three layers of semiconductor material, forming two junctions, and are composed of three terminals: the emitter, base, and collector. The emitter is configured to inject charge carriers (electrons or holes) into the base region.

In a bipolar transistor, the functionality of the emitter is crucial because it establishes the current flow from the emitter through the base to the collector. The design allows it to amplify signals and function as a switch in various circuits, making it a fundamental component in electronics.

In contrast, other options do not include an emitter electrode in their structure. Field effect transistors feature a gate, source, and drain configuration; silicon diodes have an anode and cathode; and a bridge rectifier consists of four diodes arranged to convert AC to DC but does not include an emitter.