When a piece of pure silicon is doped with aluminium, then
- A.the conductivity of the doped silicon piece will remain the same
- B.the doped silicon piece will become n-type
- C.the doped silicon piece will become p-type
- D.the resistivity of the doped silicon piece will increase
Show answer
Aluminium has three valence electrons, one fewer than silicon, so each aluminium atom leaves a hole that acts as a positive charge carrier.
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