{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

2_1_Sample Problems

2_1_Sample Problems - Sample Problems SET 1 1 Starting from...

This preview shows pages 1–2. Sign up to view the full content.

Sample Problems SET 1 1. Starting from the values calculated in the Course Reader for the effective density of states in silicon at room temperature assuming the effective mass to be the same as that of the free electrons, find the effective masses if the density of states is equal to N c = 2,96 x 10 19 cm 3 and N v = 3.1 x 10 19 cm -3 . 2. Calculate the probability that a donor atom will be ionized at T =200K if E D is given to be .03 eV below E c , the conduction band minimum. SET 2 1. Consider a collection of 2 x 10 22 electrons per cm 3 in a solid. Calculate the Fermi energy E F at T = 0K. 2. How many electrons are there with energy between 0.85 eV and 0.85 + .00001 eV ? 3. How many electrons are there per unit volume with energy below 1 eV? 4. How many electrons are there with energy between 0.5 eV and 1.5 eV? 5. What fraction of the total number of electrons has energy below E F + 0.2 eV at T = 0 K? 6. At T = 0 K what is the average of F, a function of momentum, given as F = α p 3 , where p is the magnitude of the momentum . Express your answer in

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 2

2_1_Sample Problems - Sample Problems SET 1 1 Starting from...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online