What is pn heterojunction?

A semiconductor p-n heterojunction is formed by interfacing a p-type and an n-type semiconductor material. By this interfacing process, the band bending occurs and the electronic properties get modified at the interface.

Is PN junction heterojunction?

So, the p-N heterojunction can be understood in a very similar way as the p-n homojunction, the p-n junction made of the same material. So, you consider the energy band diagram before forming junction as shown here in the left figure.

What are the heterojunction devices?

Heterojunction devices find its application in optical devices like semiconductor lasers. A semiconductor Heterojunction is formed by chemical bonding at the interface. Heterojunction is usually formed by the method of epitaxy and there forms a misfit between the two semiconductors.

What is heterojunction II?

The type-II heterojunction plays an important role in charge separation through the energy band of ZnO bending upward and that of g-C3N4 bending downward toward the interface to increase the photocatalytic performance.

What is heterojunction double heterojunction homojunction?

A homojunction is a contact between two of the same semi- conductors (silicon with silicon for example) while a heterojunction is a contact between two dissimilar materials.

What happens heterojunction?

A heterojunction is the interface that occurs between two layers or regions of dissimilar crystalline semiconductors. These semiconducting materials have unequal band gaps as opposed to a homojunction.

What are the advantages of heterojunction?

The heterojunction solar cells have several advantages over homojunction cells such as high flexibility in band gap engineering and wide availability of various materials and combinations in designing PV cells with better absorption and efficiency.

How the homojunction are different with heterojunction used in diode laser?

A homojunction uses the same semiconductor material (of course with different doping) on both sides of the junction, a heterojunction uses two semiconductor materials having different bandgap energies on both sides of the junction.

Why heterojunction LED is used?

Following are the benefits or advantages of DH (Double Heterojunction) LED: ➨It offers higher efficiency with low to high radiance compare to single homojuction (p-n+) LED type. ➨Emitting wavelength of GaAs/AlGaAs based DH LEDs range approx. between 0.8 to 0.9 µm.

What is the main problem of the heterojunction semiconductor?

The valence and conduction band discontinuities, †Ev and †Ec, result from the different energy gaps of the two semiconductors forming a heterojunction.