Excitation = Exciton? - Physics Stack Exchange
Jul 25, 2024 · An exciton is a bound interaction between the electron and its hole. It has a lower energy than the lowest conduction band state, and it is often observable through photoluminescence (at a …
How to understand exciton? - Physics Stack Exchange
Oct 28, 2017 · An exciton really is a electron coupled to a hole, just as you said. A electron gets excited to a higher band, leaving a hole in the lower band behind (a bit like a bubble on top of a liquid). You …
Why is the exciton binding energy slightly smaller than the band gap ...
Dec 7, 2016 · This gives rise to an exciton (conduction electron-valence hole pair). The energy released when these recombine (exciton binding energy, $E_B$) is said to be slightly lower than the band gap …
solid state physics - Energy of exciton formation in semiconductors ...
Oct 20, 2020 · An exciton can form when a material absorbs a photon of lower energy than its bandgap. This can be seen in image 1 where we get characteristic lines such as n = 1 describing the formation …
quantum mechanics - exciton binding energy and orbital binding …
Mar 22, 2016 · The binding energy of an exciton is not the energy released when they recombine; it is the energy required to create a free electron and hole from it. The electron and hole were previously …
Spin and wavefunction of Excitons - Physics Stack Exchange
Feb 3, 2022 · My Bachelor thesis is all around Excitons (specifially transitions between excitons of different energies). During my work I often had trouble with the spin and the wavefunction of them. Is …
Exciton in semi-conductor - Physics Stack Exchange
Nov 30, 2014 · The exciton is a quasi-particle. It can be thought of just the interaction energy between the hole and electron. This pair of particles obeys the Coulomb field and is a bound state. Much like …
Excitons and Photoluminescence (PL) - Physics Stack Exchange
Aug 26, 2024 · Lower binding energy for an exciton means that the luminescence frequency is close to that of the band gap. This means that lesser energy is needed for the exciton to be destroyed via …
Extension from Excitons to Trions - Physics Stack Exchange
Dec 6, 2023 · An exciton state is considered a bound electron-hole pair. This can be formed by is we have a ground state which consists of a full valence band and a photon comes along with momentum …
Exciton-phonon coupling Hamiltonian - Physics Stack Exchange
Feb 1, 2023 · I'm reading this article about coherent exciton transport in photosynthetic light harvesting and the role of quantized vibrations. Along the way, I came across a section where the article …