2. The law of mass action for semiconductors states that (in thermal equilibrium

Question

2. The law of mass action for semiconductors states that (in thermal equilibrium) the product of the electron concentration and the hole concentration is a constant: np = constant Since in intrinsic silicon n-p-ni, the intrinsic concentration (see Problem 1 above), this means that np = ni2. 1ppb (1 part in 10) As atoms. Given that the Suppose we dope Si with atomic concentration of Si (the number of Si atoms per unit volume) is 5x 1022 cm 3, what is the electron concentration? (5 points) a. b. Apply the law of mass action to find the hole concentration in this sample (5 points)

Explanation / Answer

For finding the electron concentration it's very necessary to know the temperature at which it is being operated.

n_0 = N_c * e ^ -(E_c - E_f)/KT

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