A charge carrier is a particle or entity that carries an electric charge and is responsible for electrical conduction in a material. In the context of solid materials, charge carriers can be classified primarily into two types: 1. **Electrons**: Negative charge carriers that are typically found in conductive materials like metals and semiconductors. They move through the material to conduct electricity. 2. **Holes**: Positive charge carriers that can be considered as the absence of an electron in a semiconductor.
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