Skip to content

#majority carriers

2 public questions tagged with this topic.

The majority carriers in a p-type semiconductor are:

**Charge carriers** in n-type majority electrons, minority holes, in p-type majority holes, minority electrons, minority concentration reduced due to recombination n_e n_h = n_i², doping increases majority, conductivity σ = e(n_e μ_e + n_h μ_h), increases with doping. Donor ionization energy small ~0.01 eV, electrons easily promoted to conduction band at room temperature. In a p-type semiconductor, trivalent doping creates holes as majority carriers, while electrons are minority carriers ( n_h gg n_e ). Substituting values gives Holes, which matches expected behaviour for this semiconductor de

Ref: NCERT > Physics Book > Electronic Devices > Doping, Charge Carriers and Conductivity

The majority carriers in an n-type semiconductor are:

**Number of carriers** from doping: Ge crystal 4×10²⁸ atoms/m³ doped 2 ppm trivalent gives acceptor atoms 8×10²² m⁻³, holes ≈ that, for 1.5 ppm 6×10²² m⁻³, for 0.5 ppm pentavalent Si 5×10²⁸ atoms/m³ gives 2.5×10²² donors/m³. Acceptor atom effectively negative when accepts electron, donor positive when donates, but crystal neutral. In an n-type semiconductor, pentavalent doping increases the number of conduction electrons, making them the majority carriers, while holes are minority carriers ( n_e gg n_h ). Substituting values gives Electrons, which matches expected behaviour for this semiconduc

Ref: NCERT > Physics Book > Electronic Devices > Doping, Charge Carriers and Conductivity