ELCT363_Lecture14_Excess_Carriers

ELCT363_Lecture14_Excess_Carriers - ELCT 363: Intro. to...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: ELCT 363: Intro. to Microelectronics Lecture 14; Slide Mandal/Fall 2011 Homework #2 is due today Midterm will be on Thursday, October 27th Closed-books/Closed-notes exam, but you may bring a face page of equations or notes No cell phones/smart phones are allowed (no texting or web browsing) Exam will cover Lecture #1 to Lecture #16 Multiple Choices and Numerical problems (20% of final grade) Announcement 1 ELCT 363: Intro. to Microelectronics Lecture 14; Slide Mandal/Fall 2011 Drift Current and Drift Velocity The electric current due to electric field is called the Drift Current. Drift current density (current per unit area): 2 pE q nE q J J J p n p,drift n,drift drift + = + = The total (electron + hole) drift current density: ( ) drift n p J q n p E = + The drift velocity is the average velocity that a particle, such as an electron, attains due to an electric field. Average electron velocity (drift velocity, v ) is proportional to the electric field E : v E, v = E , = v /E [(m/s)/(V/m) = m2/(V.s)] ELCT 363: Intro. to Microelectronics Lecture 14; Slide Mandal/Fall 2011 Diffusion Current Diffusion is due to concentration difference between two regions of a semiconductor The carriers will move from higher concentration region to the lower one....
View Full Document

Page1 / 12

ELCT363_Lecture14_Excess_Carriers - ELCT 363: Intro. to...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online