With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

With which one of the following elements silicon should be doped so as to give p-type of semiconductor?
  1. Germanium
  2. Arsenic
  3. Selenium
  4. Boron

Solution

The n-type semiconductors are obtained when Si or Ge are doped with elements of group 15 , eg, arsenic (As), while p-type semiconductors are obtained when Si or Ge are doped with traces of elements of group 13 , ie, indium (In), boron (B) . Note : The conductivity of semiconductors increases with rise in temperature.

Asked in: NEET 2008 (Screening)

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