Exciton annihilation

{
  "id": "MLC-T-CHM-004192",
  "term": "Exciton annihilation",
  "field": "Chemistry",
  "definition": "A process in which two excitons interact, leading to the de-excitation of one exciton and the transfer of its energy to the other, which then de-excites non-radiatively or emits a photon of higher energy. This phenomenon reduces the overall quantum efficiency of light-emitting devices. It is particularly relevant in organic semiconductors where exciton densities can be high.",
  "subject": "Polymer",
  "references": [
    "PAC, 2022, 94, 15. 'Glossary of terms relating to electronic, photonic and magnetic properties of polymers (IUPAC Recommendations 2021)' on page 31 (https://doi.org/10.1515/pac-2020-0501)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/exciton-annihilation/"
}