P-type Semiconductor
| Also Known As | Hole-type semiconductor, acceptor semiconductor, p-doped semiconductor |
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What is P-type Semiconductor?
A p-type semiconductor is a semiconductor doped with acceptor impurities that create "holes" (positive charge carriers) in the valence band. In silicon, p-type doping is achieved by adding Group 13 elements (B, Al, Ga, In) which have only 3 valence electrons — one fewer than Si. The missing electron creates a hole that acts as a positive charge carrier. P-type and n-type semiconductors together form p-n junctions used in all semiconductor devices.
Properties & Characteristics
Uses & Applications
Safety Information
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Key Facts
Frequently Asked Questions
A p-type semiconductor is a semiconductor doped with acceptor impurities that create "holes" (positive charge carriers) in the valence band. In silicon, p-type doping is achieved by adding Group 13 elements (B, Al, Ga, In) which have only 3 valence electrons — one fewer than Si. The missing electron creates a hole that acts as a positive charge carrier. P-type and n-type semiconductors together form p-n junctions used in all semiconductor devices.
Transistors (BJT, MOSFET). Diodes (p-n junction — p side). Solar cells. LEDs. Integrated circuits. Rectifiers. Photodetectors. Electronic sensors.
Dopant gases (diborane B₂H₆) used in doping are toxic and flammable. Semiconductor fabrication involves various hazardous chemicals. Finished devices are safe in normal use.