{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 4 Lecture - Part 2

An arbitrary electron concentration gradient in one

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

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

Unformatted text preview: e of electrons by diffusion. An arbitrary electron concentration gradient in one dimension (a) division of n(x) into segments of length equal to a mean free path for the electrons; (b) expanded view of two of the segments centered at x0. Diffusion of Carriers Diffusion • Diffusion Currents – Usually we think of charge flow (current) as a result Usually of an applied external field of – Current can also flow as a result of a gradient in Current charge distribution charge • This is known as a diffusion current • Expressed in terms of the carrier concentration gradient • Diffusion and Drift Currents – Applicable when there is an external f...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online