Fundamental absorption edge

{
  "id": "MLC-T-CHM-004721",
  "term": "Fundamental absorption edge",
  "field": "Chemistry",
  "definition": "The wavelength or energy at which a material begins to strongly absorb electromagnetic radiation due to fundamental electronic transitions, such as electrons moving from the valence band to the conduction band. This edge corresponds to the band gap energy of the material. It is a characteristic property of semiconductors and insulators.",
  "synonyms": [
    "fundamental absorption threshold"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "fundamental absorption"
  ],
  "references": [
    "PAC, 2011, 83, 931. 'Glossary of terms used in photocatalysis and radiation catalysis (IUPAC Recommendations 2011)' on page 955 (https://doi.org/10.1351/PAC-REC-09-09-36)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/fundamental-absorption-edge/"
}