Why is electron hole recombination?

Why is electron hole recombination?

The process of electron and hole annihilation is known as recombination. If the energy released through recombination is in the form of a photon, the process is known as radiative-recombination and is most common for electrons moving fully from the conduction to the valence band.

What is free electron hole?

The free electron and hole both contribute to conduction about the crystal lattice. That is, the electron is free until it falls into a hole. This is called recombination. If an external electric field is applied to the semiconductor, the electrons and holes will conduct in opposite directions.

What happens when electron and hole recombine?

At any temperature the number of holes and electrons are equal but due to thermal motion and diffusion process whenever an electron falls in a hole a ‘recombination’ can be said to have happened .

What is meant by recombination process?

Recombination is a process by which pieces of DNA are broken and recombined to produce new combinations of alleles. This recombination process creates genetic diversity at the level of genes that reflects differences in the DNA sequences of different organisms.

What is electron hole theory?

An electron hole (often simply called a hole) is the lack of an electron at a position where one could exist in an atom or atomic lattice. It is one of the two types of charge carriers that are responsible for creating electric current in semiconducting materials.

What is the difference between a hole and a free electron in a semiconductor?

Solution : (i) Electron is a negatively charged particle having charge `=1.6 xx 10^(-19)C`. Hole is a seat having positive charge which is produced when an electron breaks away from a covalent bond in a semiconductor. Hole is having the same charge as that of electron.

When a free electron combine with a hole then it becomes?

The one atom of the conduction band orbit may intersect with the hole orbit of another atom. As a result of this intersection, the conduction band electron falls into a hole. This merging of the free electron and a hole is called Recombination of Electron and Hole.

What is the recombination process?