Glossary

n-type

Beginner

Silicon with extra free electrons, made by mixing in atoms that each have one electron to spare.

Novice

Silicon doped with donors (P, As, Sb). Electrons are the majority carriers and the Fermi level sits closer to the conduction band.

Expert

n≈Ndn \approx N_{\mathrm{d}} when Nd≫niN_{\mathrm{d}} \gg n_{\mathrm{i}}, p=ni2/Ndp = n_{\mathrm{i}}^2/N_{\mathrm{d}}, and EF−Ei=kTln⁡(Nd/ni)E_{\mathrm{F}} - E_{\mathrm{i}} = kT \ln(N_{\mathrm{d}}/n_{\mathrm{i}}). Above roughly 1019 cm−310^{19}\,\mathrm{cm^{-3}} the material becomes degenerate and Boltzmann statistics no longer apply.

Explained in Bands, doping and the p-n junction (Transistors).

See also: Doping, p-type.

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