IN/0027 - SEMICONDUCTOR PHYSICS
Academic Year 2018/2019
Free text for the University
LUCIANO COLOMBO (Tit.)
- Teaching style
- Lingua Insegnamento
|[70/89] ELECTRICAL, ELECTRONIC AND COMPUTER ENGINEERING||[89/20 - Ord. 2016] ELETTRONICA||6||60|
|[70/89] ELECTRICAL, ELECTRONIC AND COMPUTER ENGINEERING||[89/50 - Ord. 2016] ELETTRONICA ON LINE||6||60|
This course is a primer on the fundamental physical properties of bulk semiconductor materials of current interest in (micro-/nano-)electronic engineering, optoelectronics and photonics. Under this respect, this course is preparatory to the next courses in solid state electronics and devices, like e.g. “Dispositivi elettronici”.
More specifically, the course will address the basics of the electronic structure, charge transport, and optical absorption in native and doped semiconductors, both elemental and compound.
The knowledge developed throughout this course exploits basic quantum mechanical concepts and their related formalism. A self-contained introduction to elementary quantum mechanics is therefore provided.
The Student will learn (i) the fundamentals of semiconductor physics and their application to actual problems relevant to engineering, (ii) to elaborate simple physical models describing solid state devices, (iii) the basics of scientific language and communication approach, and (iv) how to integrate the concepts of fundamental physics and the principles of engineering into a unique body of knowledge.
The expected learning outcome is the understanding the physical phenomena and laws ruling over solid state micro-/opto-electronic devices.
In order to fully benefit of this course, the Student must have a solid background in calculus, classical mechanics, and electromagnetism, as well as a robust problem-solving ability.
- A primer on quantum mechanics (the electron wavefunction; the Schroedinger equation; the potential barrier and the quantum well; photon absorption/emission and electron transitions between discrete energy levels).
- Fundamentals of crystalline order and structure; reciprocal lattice; point and extended defecs; doping.
- Elementary theory of electronic structure in crystalline bulk materials (free electrons in metals; electrons in a periodic potential; the Bloch theorem; the semiconductor band structure model; the density of states; the Fermi-Dirac distribution function)
Semiconductor materials (crystalline structure; direct and reciprocal lattice; intrinsic and doped semiconductors)
- Charge transport in semiconductors (electron and hole mobility; electrical conductivity; current density)
Charge carrier statistics (intrinsic and extrinsic case; mass action law; compensation; nonequilibrium conditions)
- Optical properties of bulk semiconductors (outline of basic inter-band transition and recombination phenomena).
Classroom lectures, self-evaluation tests, guided practical sessions (problem solving); possibly, tutorship.
1 CFU = 10 teaching hours + 15 hours of home assignments.
Verification of learning
Final exam, consisting in both a written (the solution to problems) and an oral (conceptual/theoretical questions) part.
* Luciano Colombo "Fisica dei Semiconduttori" (Zanichelli, Bologna, 2018) - ISBN 978-88-08-52054-8
- Useful/alternative reading
* Marius Grundmann, “The Physics of Semiconductors" (Casa Editrice Springer) - ISBN-10 3-540-25370-X.
* S.O. Kasap "Principles of electrical engineering materials and devices" (McGraw-Hill, 2000) - ISBN 0-07-235644-8
* D.A. Neamen "Semicondutor Physics and Devices" (McGraw-Hill, 2003) - ISBN 0-07-232107-5
Lectures will be delivered by means of a hand-writing tablet, so as to let any Student taking her/his own notes in the most confortable way.