01244 IUPAC Gold Book - conduction band 10.1351/goldbook.C01244 C01244 current 1 A vacant or only partially occupied set of many closely spaced electronic levels resulting from an array of a large number of atoms forming a system in which the electrons can move freely or nearly so. This term is usually used to describe the properties of metals and semiconductors. Fermi level https://goldbook.iupac.org//terms/view/F02341 bandgap energy https://goldbook.iupac.org//terms/view/B00593 valence band https://goldbook.iupac.org//terms/view/V06589 PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2233 (https://doi.org/10.1351/pac199668122223) https://goldbook.iupac.org/terms/view/C01244/html https://goldbook.iupac.org/terms/view/C01244/json https://goldbook.iupac.org/terms/view/C01244/plain Citation: 'conduction band' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.C01244 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-06-07T02:15:09+00:00