Name the majority charge carrier in the doped material.

Holes

Electrons

Electron-hole pairs

The dopant ion

electron

To determine the majority charge carrier in a doped material, you need to understand the concept of doping. Doping involves introducing impurities into a semiconductor material to change its electrical properties. The impurities added are typically called dopants.

In a doped material, the majority charge carrier refers to the type of charge carriers that are most abundant within the material. The majority charge carrier can be either electrons or holes.

1. Electrons: When a material is doped with impurities that introduce extra electrons, such as phosphorus (P) in silicon (Si), the majority charge carriers are electrons. The extra electrons from the dopant atoms contribute to the conduction of electricity in the material.

2. Holes: Conversely, when a material is doped with impurities that create a deficiency of electrons, such as boron (B) in silicon (Si), the majority charge carriers are called holes. A hole is essentially an empty space where an electron should be. When an electron moves from one location to another within the material, it leaves a hole behind, which can then move and participate in electrical conduction.

3. Electron-hole pairs: In some cases, both electrons and holes can exist as majority charge carriers simultaneously. This situation typically occurs in optoelectronic devices like photodiodes or solar cells, where light absorption creates electron-hole pairs that contribute to the overall current flow.

4. The dopant ion: While the dopant ion itself does not directly serve as the majority charge carrier, it plays a crucial role in creating the majority carrier type by either introducing additional electrons or creating holes.

To determine the majority charge carrier in a specific doped material, you need to know the type of dopant used and how it affects the material's electron distribution.