Register to reply

P-N Junction Depth

by mmaarrkk
Tags: depth, junction
Share this thread:
Apr17-14, 03:00 PM
P: 1

Could anyone explain how the affect that P-N junction depth has on the performance of a semiconductor device? Are there any devices which would benefit from having a much larger junction depth?
Phys.Org News Partner Physics news on
'Squid skin' metamaterials project yields vivid color display
Scientists control surface tension to manipulate liquid metals (w/ Video)
Simulation method identifies materials for better batteries
M Quack
Apr20-14, 12:20 PM
P: 672
For example, it affects the capacitance of the device, which can be important in high-frequency applications.

Also, for x-ray detector photo diodes P-I-N diodes are used to increase the depth of the depletion layer in order to increase the active volume. Silicon is rather light and x-rays can penetrate quite deep through silicon. So most photons would simply pass through a thin, normal depletion layer without being absorbed, and thus without creating an electric signal in the detector.

Register to reply

Related Discussions
Flow of gas in a t-junction with one junction sealed. General Engineering 9
P-N junction Engineering, Comp Sci, & Technology Homework 5
Transistors-Why can't a pn junction and np junction in series be a pnp transistor? Atomic, Solid State, Comp. Physics 3
Setup help needed:apparent depth vs. actual depth Introductory Physics Homework 17
Actual Depth and Apparent Depth Introductory Physics Homework 19