Lecture
This lecture covers the concept of density of states in semiconductor devices, starting with the electron gas and particle in an infinite quantum well. It then progresses to crystalline solids, periodic potentials, and energy bands. The lecture also discusses the Fermi-Dirac distribution, band structures, and the distinction between metals, semiconductors, and insulators based on band gaps. The presentation concludes with examples of 1D, 2D, and 3D density of states, as well as the interpretation of excitons and photoluminescence in materials.