Objectives: The aim of this course is to present the study thanks to the solid-state physics of the materials used because of their semiconducting properties.
Outline (with number of hours per part)
Lect
PSS
LW
• Introduction: standard materials, crystallographic lattices, real and reciprocal spaces
• Vibrational properties of a semiconductor lattice: phonon dispersion, electron/phonon scattering
• Electronic energy band structure: description with LCAO approach, nearly-free electron approach, k.p method, spin-orbit coupling, effective masses and dynamics of electrons and holes
• Energy levels due to impurities, shallow levels, deep levels
• Carrier density in a semiconductor: Fermi statistics, non degenerate semiconductors, quasi-Fermi levels, Shockley diagram
• Transport and non equilibrium phenomena: Boltzmann equation, drift-diffusion approach and its limitations, continuity equations, Gunn effect in GaAs, strained Si, non stationary transport, high field transport (impact ionization, band to band tunneling)
• Drift-diffusion model from ideal gas law, Debye length and dielectric relaxation time
