By Greg Parker
ISBN-10: 0750310219
ISBN-13: 9780750310215
Creation to Semiconductor gadget Physics is a well-liked and proven textual content that provides an intensive advent to the underlying physics of semiconductor units. It starts with a evaluation of easy reliable kingdom physics, then is going directly to describe the homes of semiconductors together with power bands, the concept that of potent mass, service focus, and conduction in additional aspect. Thereafter the ebook is worried with the rules of operation of particular units, starting with the Gunn Diode and the p-n junction. the remainder chapters disguise the on particular units, together with the LED, the bipolar transistor, the field-effect transistor, and the semiconductor laser. The booklet concludes with a bankruptcy supplying a short advent to quantum concept. no longer brazenly mathematical, advent to Semiconductor equipment Physics introduces simply these actual thoughts required for an knowing of the semiconductor units being thought of. The author's intuitive sort, coupled with an intensive set of labored difficulties, make this the suitable introductory textual content for these interested in figuring out electric and digital engineering, utilized physics, and similar subjects.
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Additional info for Introductory Semiconductor Device Physics
Example text
In order = ENERGY BANDS AND EFFECTIVE MASS 22 for the electron to change its momentum another particle must be involved for energy and momentum conservation. This 'particle' is called a phonon and it is in fact just a lattice vibration. At any finite temperature the lattice atoms will be vibrating about their mean positions and these vibrations lead to the propagation of vibrational waves, phonons, throughout the crystal. The momentum change required for the electron to recombine with the hole in the indirect band-gap semiconductor comes from the interaction of the electron with a phonon.
This process produces equal numbers of electrons and holes. The other way is to introduce electron deficient (with regard to the silicon bonding requirements) atoms into the silicon lattice. Adding these acceptors to the silicon lattice also introduces holes into the valence band, but we have to look a little further to see how this occurs. We need a physical picture to appreciate what is happening with these acceptor states. Let us think a little about these vacant electron states. Very little energy is required to move a nearby valence electron into the vacant state.
There are at least four good reasons. 1 Up to this point in the chapter we have only considered energy-band diagrams. To appreciate what the effective mass means we have to look at energy momentum diagrams. These energy-momentum diagrams will later show us why bulk silicon is a poor producer of photons and why gallium arsenide produces photons with a high efficiency. Also, an understanding of energy momentum diagrams is all that is required in order to understand the basic workings of the Gunn diode, a source of microwaves that is simply a piece of gallium arsenide !
Introductory Semiconductor Device Physics by Greg Parker
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