Semiconductor Physics and Devices: Basic Principles by Donald A. Neamen
Semiconductor Physics and Devices: Basic Principles
Indeed, the ancient Greeks put this hypothesis forward over two millennia ago. A semiconductor device which conducts electric current run in one direction only. It is useful for simulating a range of practical devices Semiconductor physics is the branch of solid state physics that focuses on specific properties of semiconductors. The conductivity of a semiconductor is somewhere between that of an insulator, which has almost no conductivity, and a conductor, which has almost full conductivity. Emphasis is placed on understanding device The Semiconductor Physics group explores and develops new physics using advanced semiconductor technology.
Fernando Silva Pena
In solid-state physics , a band gap , also called an energy gap or bandgap , is an energy range in a solid where no electron states can exist. In graphs of the electronic band structure of solids, the band gap generally refers to the energy difference in electron volts between the top of the valence band and the bottom of the conduction band in insulators and semiconductors. It is the energy required to promote a valence electron bound to an atom to become a conduction electron , which is free to move within the crystal lattice and serve as a charge carrier to conduct electric current. If the valence band is completely full and the conduction band is completely empty, then electrons cannot move in the solid; however, if some electrons transfer from the valence to the conduction band, then current can flow see carrier generation and recombination. Therefore, the band gap is a major factor determining the electrical conductivity of a solid. Substances with large band gaps are generally insulators , those with smaller band gaps are semiconductors , while conductors either have very small band gaps or none, because the valence and conduction bands overlap. Every solid has its own characteristic energy-band structure.