Bandgap energy

{
  "id": "MLC-T-CHM-001108",
  "term": "Bandgap energy",
  "field": "Chemistry",
  "definition": "The minimum amount of energy required to promote a valence electron from its bound state in the valence band to a mobile state in the conduction band. This energy gap separates the highest occupied electronic energy levels (valence band) from the lowest unoccupied levels (conduction band) in a solid material. The magnitude of the bandgap energy, measured in electronvolts (eV), determines whether a material is a conductor, semiconductor, or insulator; silicon has a bandgap of approximately 1.12 eV.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "Fermi level",
    "conduction band",
    "semiconductor",
    "valence band"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2229 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/bandgap-energy/"
}