p-type semiconductor

Thân thiện

A student studies a diagram of a p-type semiconductor in a physics textbook.

Definition

1. Noun:
   • A semiconductor material in which electrical conduction occurs primarily through the movement of positive charge carriers called "holes": A p-type semiconductor is created by doping an intrinsic semiconductor (like silicon) with atoms that have fewer valence electrons than the semiconductor atoms. This creates an abundance of positive charge carriers (holes), making "hole" flow the dominant mechanism for electric current.

Usage Examples

• Noun:
  • The transistor's base region is made from a p-type semiconductor.
  • Boronis a common dopant used to create a p-type semiconductor in silicon wafers.
  • In a p-n junction, the p-type semiconductor is the region with an excess of holes.

Advanced Usage

• "p-type" as a modifier: The term "p-type" is commonly used as an adjective to describe the semiconductor type.
  • The p-type layer is crucial for the diode's function.
• Concept of "majority carriers": In a p-type semiconductor, holes are the majority charge carriers, while electrons are the minority carriers.
  • The current in a p-type semiconductor is predominantly due to majority carrier (hole) movement.

Variants and Related Words

• p-type (adj): Describing the property of being a p-type semiconductor.
  • p-type material, p-type doping
• Hole (n): The conceptual positive charge carrier whose movement constitutes current in a p-type semiconductor.
• Acceptor atom (n): The dopant atom (e.g., boron) that accepts an electron, creating a hole in the crystal lattice.
• Extrinsic semiconductor (n): A general term for a doped semiconductor, which includes both p-type and n-type.

Synonyms

• Acceptor-doped semiconductor: A more technical synonym emphasizing the doping process.
• Positive-hole semiconductor: A descriptive synonym highlighting the primary charge carrier.

Related Concepts and Phrases

• p-n junction: A fundamental structure formed by joining a p-type and an n-type semiconductor.
  • A diode is essentially a p-n junction.
• Doping: The intentional process of adding impurities to a semiconductor to change its electrical properties.
  • p-type doping involves adding Group III elements.
• Majority carrier: The most abundant charge carrier in a semiconductor (holes in p-type).
• Minority carrier: The less abundant charge carrier in a semiconductor (electrons in p-type).

Học thuật

Noun

1. a semiconductor in which electrical conduction is due chiefly to the movement of positive holes