exciton
Sign in to savethumbnail|Frenkel exciton, bound electron-hole pair where the hole is localized at a position in the crystal represented by black dots thumbnail|Wannier–Mott exciton, bound electron-hole pair that is not localized at a crystal position. This figure schematically shows diffusion of the exciton across the lattice.
Article
21 sectionsContents
- Occurrences
- History
- Types
- Frenkel exciton
- Wannier–Mott exciton
- 3D semiconductors
- 2D semiconductors
- Example: excitons in transition metal dichalcogenides (TMDs)
- 0D semiconductors
- Hubbard exciton
- Charge-transfer exciton
- Surface exciton
- Dark exciton
- Atomic and molecular excitons
- Giant oscillator strength of bound excitons
- Self-trapping of excitons
- Interaction
- Spatially direct and indirect excitons
- Fractional excitons
- See also
- References
thumbnail|Frenkel exciton, bound electron-hole pair where the hole is localized at a position in the crystal represented by black dots thumbnail|Wannier–Mott exciton, bound electron-hole pair that is not localized at a crystal position. This figure schematically shows diffusion of the exciton across the lattice.
An exciton is a bound state of an electron and an electron hole which are attracted to each other by the electrostatic Coulomb force resulting from their opposite charges. It is an electrically neutral quasiparticle regarded as an elementary excitation primarily in condensed matter, such as insulators, semiconductors, some metals, and in some liquids. It transports energy without transporting net electric charge.