description Exciton Overview
An exciton is a bound state of an electron and positively charged "hole" created when an electron transitions to a higher energy level in a material, effectively behaving as a quasi-particle with properties like mass and momentum.
help Exciton FAQ
What exactly is an exciton?
An exciton is a bound pair made from one excited electron and one positively charged hole. Together they behave as a quasi-particle with properties such as effective mass and momentum.
How is an exciton created in a material?
A photon or another energy input can lift an electron into a higher energy state, leaving a hole behind. The electron and hole can then remain bound through Coulomb attraction, forming an exciton.
Where do excitons matter in real technology?
Excitons are important in semiconductors, light-emitting materials, solar cells, and two-dimensional materials. Their formation and recombination affect how a material absorbs and emits light.
Is an exciton a new fundamental particle?
No. An exciton is a composite quasi-particle made from an electron and a hole inside a material. When the pair recombines, its energy can be released as light or transferred to the lattice.
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