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  2. Exciton - Wikipedia

    en.wikipedia.org/wiki/Exciton

    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 insulators, semiconductors, some metals, and in some liquids.

  3. List of quasiparticles - Wikipedia

    en.wikipedia.org/wiki/List_of_quasiparticles

    An electron as affected by the other forces and interactions in the solid: electron Electron hole (hole) A lack of electron in a valence band: crystal lattice Exciton: A bound state of an electron and a hole (See also: biexciton) electron, hole Exciton-polariton: A bound state of an exciton and a photon. photon, exciton Ferron

  4. Carrier generation and recombination - Wikipedia

    en.wikipedia.org/wiki/Carrier_generation_and...

    The electronhole pair is the fundamental unit of generation and recombination in inorganic semiconductors, corresponding to an electron transitioning between the valence band and the conduction band where generation of an electron is a transition from the valence band to the conduction band and recombination leads to a reverse transition.

  5. Wannier equation - Wikipedia

    en.wikipedia.org/wiki/Wannier_equation

    For one electron and one hole, this problem is analogous to the Schrödinger equation of the hydrogen atom; and the bound-state solutions are called excitons. When an exciton's radius extends over several unit cells, it is referred to as a Wannier exciton in contrast to Frenkel excitons whose size is comparable with the unit cell. An excited ...

  6. Semiconductor Bloch equations - Wikipedia

    en.wikipedia.org/wiki/Semiconductor_Bloch_equations

    However, a real exciton is a true two-particle correlation because one must then have a correlation between one electron to another hole. Therefore, the appearance of exciton resonances in the polarization does not signify the presence of excitons because is a single-particle transition amplitude. The excitonic resonances are a direct ...

  7. Electron hole - Wikipedia

    en.wikipedia.org/wiki/Electron_hole

    When an electron leaves a helium atom, it leaves an electron hole in its place. This causes the helium atom to become positively charged. In physics, chemistry, and electronic engineering, an electron hole (often simply called a hole) is a quasiparticle denoting the lack of an electron at a position where one could exist in an atom or atomic lattice.

  8. Electron excitation - Wikipedia

    en.wikipedia.org/wiki/Electron_excitation

    Electron excitation is the transfer of a bound electron to a more energetic, but still bound state. This can be done by photoexcitation (PE), where the electron absorbs a photon and gains all its energy [1] or by collisional excitation (CE), where the electron receives energy from a collision with another, energetic electron. [2]

  9. Electron-hole droplets - Wikipedia

    en.wikipedia.org/wiki/Electron-hole_droplets

    Electron-hole droplets are a condensed phase of excitons in semiconductors. The droplets are formed at low temperatures and high exciton densities, the latter of which can be created with intense optical excitation or electronic excitation in a p-n junction.

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