Elektronbærere

Elektronbærere is a term used in physics and electronics to refer to particles that carry an electric charge, allowing for the flow of electric current. In most solid materials, these charge carriers are electrons. When an electric field is applied across a conductor, these free electrons are set in motion, creating a current. The movement of these electrons is not usually a simple, direct path; they collide with atoms within the material, leading to resistance.

However, in some materials, particularly semiconductors, charge can also be carried by other entities called "holes." A hole can be thought of as the absence of an electron in a normally occupied state. When an electron moves to fill a hole, it effectively transfers the hole's position. This movement of holes also contributes to electrical conductivity. Therefore, elektronbærere encompass both electrons and holes in materials where both phenomena are relevant for electrical conduction. The type and number of elektronbærere, along with their mobility, determine a material's electrical conductivity. Understanding elektronbærere is fundamental to comprehending how electrical devices function, from simple wires to complex integrated circuits.