What is a direct semiconductor?

There are two main types of semiconductors from which engineers can choose: direct semiconductor and indirect. Both work in different ways with conductive and valence strips that are important in electricity, but both also try to find a minimum difference between the two belts. The direct semiconductor is used when valence and conductive strips have the same momentum. This semiconductor is important in the radiation recombation, in which the electron jumps from one band to another. The lower belt is known as VALANCE BAND. This represents the minimum amount of energy that the electron has because the electron is still bound to the atom; These electrons have very low momentum. Higher of the belts is a conductive band. This occurs when the electron is exempt from the atom and is able to move freely in the atomic grid and produce energy.

The direct semiconductor is to reduce the energy from one zone to another. In order for the electron movement process to be facilitated, the semiconductor finds the shortest way or path with the lowest amount of energy to make one electron divided from the valence zone and jumped into the conductive zone. The easiest way between them is when the conductive zone falls down and the valence zone comes to create a small gap between two energy bands.

The direct semiconductor can only be used if both belts perform this movement simultaneously. This means that both belts must have the same momentum of electrons. This is common mostly in low -power electronics and devices, as there is not much momentum required and the belts can normally move synchronization.

In order for a direct semiconductor to work, the electron must be based on the valence zone. This causes the hole to ruin the valence belt and the resulting energy becomes a photon. At the same time, the conductive group drops down to receive energy because it moves from the valence zone and over the semiconductor.

The indirect semiconductor is similar to direct, but the difference is in the way both belts move. In this schemeThe valence and conductive zones move separately, so Valence appears at one point while the line drops later. The indirect semiconductor takes charge from the valence zone, holds it and waits for the conductive zone to fall to store energy.