Charges at Interfaces: Fermi-Dirac Distribution and Density of States

This lecture covers the Fermi-Dirac distribution for thermal distribution of electron energies, the concept of Fermi energy, and the density of occupied states in materials. It explains the differences in the Fermi level between metals, semiconductors, and insulators, and discusses the temperature-dependent density of occupied states in semiconductors. Additionally, it explores the behavior of ideal metallic electrodes in organic semiconductor devices, the role of electrode materials, and the mechanisms of charge injection. The lecture concludes with insights on band bending, activation energy barriers for charge injection, and the different methods of charge injection in organic semiconductors.