Excition
Exciton is a bound state of an electron and an electron hole which are attracted to each other by the electrostatic Coulomb force. Excitons are fundamental to the understanding of semiconductors and insulators, as well as to the study of organic materials and molecular crystals. They play a crucial role in the process of light absorption and emission in these materials.
In semiconductors, excitons can be classified as either direct or indirect. Direct excitons are those in which
Excitons can also be categorized based on their binding energy. Strongly bound excitons have a large binding
Excitons are responsible for a variety of phenomena in materials science, including photoluminescence, electroluminescence, and the
In summary, excitons are a fundamental concept in the study of semiconductors, insulators, and organic materials.