Multiple choice

Silicon is doped with boron to a concentration of 4 x 1017 atoms cm3. Assume the intrinsic carrier concentration of silicon to be 1.5 x 1010 cm3 and the value of kT/q to be 25 mV at 300 K. Compared to undopped silicon, the fermi level of doped silicon

  1. goes down by 0.31 eV

  2. goes up by 0.13 eV

  3. goes down by 0.427 eV

  4. goes up by 0.427 eV

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation