N-type Semiconductor
| Also Known As | Electron-type semiconductor, donor semiconductor, n-doped semiconductor |
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What is N-type Semiconductor?
An n-type semiconductor is a semiconductor that has been doped with donor impurities that contribute extra electrons (negative charge carriers) to the conduction band. In silicon, n-type doping is achieved by adding Group 15 elements (P, As, Sb) which have 5 valence electrons — one more than Si. The extra electron is loosely bound and easily excited into the conduction band, increasing electrical conductivity.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
An n-type semiconductor is a semiconductor that has been doped with donor impurities that contribute extra electrons (negative charge carriers) to the conduction band. In silicon, n-type doping is achieved by adding Group 15 elements (P, As, Sb) which have 5 valence electrons — one more than Si. The extra electron is loosely bound and easily excited into the conduction band, increasing electrical conductivity.
Transistors (BJT, MOSFET — n-type regions). Diodes (p-n junction). Solar cells (n-type layer). LEDs and laser diodes. Integrated circuits. Photodetectors. Sensors. Electronic devices.
Semiconductor dopant chemicals (phosphine PH₃, arsine AsH₃) used in doping processes are highly toxic. Arsenic compounds (As): carcinogenic. Semiconductor processing involves corrosive and toxic gases. Finished devices are safe in normal use.