What type is SBD?

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The Schottky barrier diode (SBD) represents a unique class of diodes characterized by its distinct junction construction. This junction is formed at the interface between a semiconductor, predominantly an n-type semiconductor, and a metal. This specific arrangement sets the SBD apart from other diode varieties.

In contrast to diodes that utilize both p-type and n-type semiconductors, the SBD employs only an n-type semiconductor in its construction. This absence of a p-n junction gives the SBD its distinctive properties and functionality.

Semiconductors, the building blocks of the SBD, possess a unique energy structure. Above the band gap, which separates the valence and conduction bands, lies an empty band. This empty band plays a crucial role in the electrical behavior of semiconductors and consequently, the SBD.

The formation of the Schottky barrier at the metal-semiconductor interface is a critical aspect of the SBD's operation. This barrier results from the differences in work functions between the metal and the semiconductor, leading to the creation of a depletion region and a potential barrier for charge carriers.