Question

What type of semiconductor obtained when Si or Ge are doped with elements of group
13 such as B or Al and why?​

Answer 1

Answer:

The n- type semiconductors are obtained when Si or Ge are doped with elements of group 15, eg, Arenic (As), while p-type semiconductors are obtained when Si or GGe are doped with traces of elements of group 13, ie indium (In), Boron (B).

Explanation:

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Answer 2

Answer:

Doping of group 14 elements (such as Si, Ge etc.) with elements of group 15 (such as As) produces an excess of electrons in the crystals. Thus, it gives n-type semiconductors. Doping of groups 14 elements with group 13 elements (such as Indium) produces holes (electron deficiency) in the crystal