An electron hole is the absence of an electron in an otherwise filled band, described as a mobile positive-charge excitation. It can form a bound state with an electron, giving an exciton.
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An electron hole, often simply referred to as a "hole," is a concept in semiconductor physics and solid-state physics. It represents the absence of an electron in a semiconductor's electronic band structure, particularly in the valence band where electrons are normally present. Here's a more detailed explanation: 1. **Electron Abundance**: In a semiconductor, electrons occupy energy states in the valence band. When an electron gains sufficient energy (e.g.