Carrier Concentration

Carrier concentration refers to the number of free charge carriers, such as electrons or holes, present in a material per unit volume. These carriers enable electrical current to flow when a voltage is applied. In semiconductors, the concentration can be controlled or change due to doping or temperature, affecting the material's electrical properties. Higher carrier concentration generally means better conductivity. Understanding this helps in designing and optimizing electronic devices like transistors, diodes, and solar cells for desired performance.