Exam 3 Solutions

# Explain what effect the intrinsic layer will have on

This preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: ater than the thickness of the intrinsic layer. ECE ­606 5 Spring 2013 4a) Sketch the electric field vs. position assuming the depletion approximation. 4b) Using the sketch in 4a), develop an expression for the depletion layer width in the p ­ region, W. Your answer should be in terms of Vbi and N A . 1 The area under the curve is the built in potential: E max xi + E max (W ! xi ) = Vbi 2 2Vbi E max = ( xi + W ) We can get another expression for E max from Gauss’s Law: E max = dE ! qN A = dx " S#0 qN A (W # xi ) ! S"0 Now equate the two expressions for E max to find: W 2 ! xi2 = Finally W = 2" S # 0Vbi qN A 2! S " 0Vbi + xi2 qN A Not...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern