Holes are the absence of electrons in a semiconductor, acting as positive charge carriers that facilitate electrical conduction. In a semiconductor's band structure, when electrons move from the valence band to the conduction band, they leave behind these vacant spots or holes. These holes behave as if they have a positive charge and play a crucial role in charge carrier transport mechanisms, impacting how electricity flows through semiconductor materials.
congrats on reading the definition of holes. now let's actually learn it.