1Diapositiva 12

Apuntes

[Diapositiva 1] Electronic Devices 10 th ed. Chapter 1 Introduction to Semiconductors [Diapositiva 2] Electronic Devices 10 th ed. ◆ Describe the structure of an atom ◆ Discuss insulators, conductors, and semiconductors and how they differ ◆ Describe how current is produced in a semiconductor ◆ Describe the properties of n -type and p -type semiconductors ◆ Describe how a pn junction is formed Objectives: [Diapositiva 3] Electronic Devices Bohr model The Bohr model of the atom is that electrons can circle the nucleus only in specific orbits, which correspond to discrete energy levels called shells . [Diapositiva 4] Electronic Devices Conductors Materials can be classified by their ability to conduct electricity. This ability is related to the valence electrons. Valence electrons are those electrons that occupy the outer shell. [Diapositiva 5] Electronic Devices Conductors Materials can be classified by their ability to conduct electricity. This ability is related to the valence electrons. Copper is an example of an excellent conductor . It has only one electron in its valence band, which can easily escape to the conduction band, leaving behind a positive ion (the co...