Question

Consider phosphorus doping in silicon, for $T = 300 \, \text{K}$, at concentration $N_d = 10^{16} \, \text{cm}^{-3}$. The fraction of total electrons still in the donor states is:

• A. 41
• B. 41
• C. 41
• D. 14

Hint:

Doping introduces donor or acceptor states in a semiconductor, altering the electron distribution and the fraction of electrons in these states.

Answer 1

The Correct Option is B

The fraction of electrons in the donor states can be determined using the formula for the concentration of electrons in the conduction band, given the donor concentration and temperature.
For Nd = 10¹⁶ cm⁻³ , the fraction of electrons in donor states is approximately 41