Multiple choice

A silicon bar is doped with donor impurities ND 2.25 x 1015 atoms/cm3. Given the intrinsic carrier concentration of silicon at T = 300 K is ni = 1.5 x 1010 cm3. Assuming complete impurity ionization, the equilibrium election and hole concentrations are

  1. n0 = 1.5 x 106 cm–3, p0 = 1.5 x 105 cm-3

  2. n0 = 1.5 x 1010 cm–3, p0 = 1.5 x 1015 cm-3

  3. n0 = 2.25 x 1015 cm–3, p0 = 1.5 x 1010 cm-3

  4. n0 = 2.25 x 1015 cm–3, p0 = 1 x 105 cm-3

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D Correct answer
Explanation