Physics of Electronic Processes
The main objective of the "Physics of electronic processes" course is to give in-depth knowledge of the physical processes that take place in a variety of electronic devices, which may find application in various fields of electronics, with an emphasis on analyzing the performance of various processes.
Electronic states in the crystal. 1. Socialized states: the law of dispersion, the effective electron mass, the distribution of electronic states, especially the dispersion law for the most important semiconductors. 2. Localized states: donor, acceptor impurities. multiple charged impurities, deep condition, the effect of impurity concentration on the band structure, amorphous semiconductors. 3. Electronic states at the surface.
Electronic states and conductivity of solids: semiclassical motion equations, conductivity types and charge carrier transport, the role of collisions (drift single particle model, diffusion media, its characteristics for charged particles).
Equilibrium state media: Summary of statistical electron distribution function, calculate the equilibrium concentration of carriers, the conductivity of metals, semiconductors, changing the equilibrium concentrations in the electric field, thermionic emission
Dynamics of electronic states. Models. 1. Kinetic equations, integral collision relaxation time approximation, static conductivity, unsteady dynamics of drift, high conductivity. 2. Relaxation particle balance equation, momentum, energy, especially for semiconductor multivalley 3. Monte Carlo method.
Carrier scattering. 1. Impurity scattering. 2. Phonon scattering: phonon spectrum, the general pattern of dispersion, acoustic, optical (polar and nonpolar) interband scattering. 3. Average relaxation times of concentration, momentum and energy.
Strong electric fields: Reheating electron gas. Drift velocity saturation in Ge, Si. Interband transitions in GaAs, negative differential conductivity. Drift velocity “splash”. Gunn effect. Electrostatic ionization. Zener effect. Thermionic ionization. Field emission, cathode tip. Avalanche processes:
Recombination processes: dynamics of recombination lifetimes. Types of electron-hole recombination in semiconductors. Dynamics of charge deep state. Electron-ion recombination in the gas plasma.
Photoelectron Processes. 1. Absorption of light: macroscopic model types A, especially law enforcement saving behavior of excited carriers, thermalization. 2. Internal and external photoelectric effect, their comparative properties: 3. Photodetectors.
