2_1_Sample Problems

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

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

View Full Document Right Arrow Icon
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.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/24/2012 for the course EE 3 taught by Professor Staff during the Spring '08 term at UCLA.

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 Right Arrow Icon
Ask a homework question - tutors are online