deep energy trap

https://doi.org/10.1351/goldbook.14003
Trap defined by an energy level (of trapped carriers) within the bandgap energy of a semiconductor or insulator with an energy difference between it and the conduction band (for electrons) or valence band (for holes) much greater than the energy of thermal excitation of the solid at a given temperature.
Notes:
  1. The dominant decay pathway of the trap is either by trapping of carriers of the opposite sign (see recombination centre) or by photoionisation (see colour centres).
  2. Some active states of a photocatalytic centre are called a deep trap (as in solid-state physics).
Source:
PAC, 2011, 83, 931. (Glossary of terms used in photocatalysis and radiation catalysis (IUPAC Recommendations 2011)) on page 946 [Terms] [Paper]
Citation: 'deep energy trap' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.14003 RIS BibTex EndNote
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