Semiconductor Physics

Semiconductor Physics studies materials whose electrical conductivity lies between that of conductors and insulators. Semiconductors exhibit unique electronic properties due to their band structure, particularly the presence of a moderate band gap between the valence and conduction bands. Charge transport in semiconductors occurs through electrons and holes, and their concentrations can be precisely controlled by doping. This controllability makes semiconductors the foundation of modern electronics. Semiconductor physics explains the operation of diodes, transistors, integrated circuits, light-emitting diodes, and solar cells. Temperature, impurities, and external fields strongly influence semiconductor behavior. Advances in semiconductor physics have enabled miniaturization, high-speed computation, and optoelectronic technologies. Research continues into wide-bandgap semiconductors, low-dimensional systems, and novel materials for next-generation electronic and energy applications.