At an atomic level, semiconductors have a crystalline structure in which their electrons are arranged in energy bands. The ...

Techniques for Band Gap Engineering vary, including doping, the introduction of impurities into a semiconductor to alter its electrical properties; strain engineering, where stress is applied to ...

Some materials can carry a current and others cannot — materials that carry a current are called conductors ... energy gap in the band structure makes the material an insulator because it ...

By contrast, conductors have a band gap that is narrow to nonexistent. Semiconductors are sometimes considered to be ...