In this handout we will consider four different kinds of commonly encountered heterostructures: Consider a junction of a p-doped semiconductor (semiconductor 1) with an n-doped semiconductor (semiconductor 2).

A heterojunction is an interface between two layers or regions of dissimilar semiconductors. These semiconducting materials have unequal band gaps as opposed to a homojunction. It is often advantageous to engineer the electronic energy bands in many solid-state device applications, including semiconductor lasers, solar cells and

Various types of heterojunctions, such as the Schottky barrier, p–n (or non-p–n), van der Waals and facet heterojunctions, can be fabricated depending on specific applications. Each type of heterojunction has its advantages and limitations; hence, proper choice of heterojunction is …

By adding connections to each end of the P-type and the N-type materials we can produce a two terminal device called a PN Junction Diode which can be biased by an external voltage to either block or allow the flow of current through it.

In p-n homojunction concentration of carriers is determined by diffusion length and injection current. Problem of carrier diffusion can be overcome by heterojunction barrier.

Consider the example of a SiGe heterojunction. The lattice constants are 5.431 A and 5.658 A for Si and Ge, respectively. For Ge on Si, this leads to a lattice mismatch () of 0.04 (4%).

In this review article, we have provided the basics and working principles of p-n heterojunctions of 2D materials for gas sensing applications. Also, we have reviewed the recent developments and future perspectives of p-n heterojunctions of 2D van …

Heterostructure: A semiconductor structure in which more than one semiconductor material is used and the structure contains interfaces or junctions between two different semiconductors

PN junction and metal–semiconductor junction are analyzed in the forward-bias and reverse-bias conditions. Of particular importance are the concepts of the depletion region and minority carrier injection.

2023年6月15日 · In this review, the formation ways, combination types and effect mechanisms of p-n heterojunction based on staggered gap are summarized, and the charge transfer modes under the joint effects of built-in electric field and band structure are …