Reverse-biased p-n Junction Simulation

A p–n junction is formed at the boundary between a P-type and N-type semiconductor created in a single crystal of semiconductor by doping, for example by ion implantation, diffusion of dopants, or by epitaxy (growing a layer of crystal doped with one type of dopant on top of a layer of crystal doped with another type of dopant).

If a diode is reverse biased, the voltage at the cathode is higher than that at the anode. Therefore, no current will flow until the diode breaks down. Connecting the P-type region / layer to the negative terminal of the battery and the N-type region / layer to the positive terminal, corresponds to reverse bias. Because the p-type material is now connected to the negative terminal of the power supply, the ‘holes’ in the P-type material are pulled away from the junction, causing the width of the depletion zone to increase. Similarly, because the N-type region is connected to the positive terminal, the electrons will also be pulled away from the junction. Therefore the depletion region widens, and does so increasingly with increasing reverse-bias voltage. This increases the voltage barrier causing a high resistance to the flow of charge carriers thus allowing minimal electric current to cross the p–n junction. The increase in resistance of the p–n junction results in the junction behaving as an insulator.

Electric field is an electric property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by the value of E (in unit of Volt/cm), called electric field strength or electric field intensity or simply the electric field. The picture below shows a simulation of electric field simulation in a reverse-biased p-n junction diode.

This movie requires Flash Player 9

3 Responses to Reverse-biased p-n Junction Simulation

  1. Cleora Volmar says:

    Hello Webmaster, I noticed that http://sapteka.net/weblog/reverse is ranking pretty low for some keywords, this may be due to the new Google Panda update, or it could be due to a variety of other factors. I’m sure you already know about On-page SEO, where Google cares highly about proper formatting of various H1/H2/H3 tags, having your main keyword appear in the beginning of your post and having your post end with the keyword, along with having keyword related alt tags and very relevant LSI. However, you do not seem to have the proper Keywords or relevant Keywords in your posts and in the website. Right now you need a tool or plugin that will allow you to check on Keyword insights, search trends and check for backlink analysis and to find out your Keyword competition. To find a Keyword Plugin that combines both Keyword Research and has the ability as a Rank Checker is what WordPress Seo Keyword, please check out our 5 minute video.

  2. uggs says:

    This is my first time i visit here. I found so many interesting stuff in your blog especially its discussion. From the tons of comments on your articles, I guess I am not the only one having all the enjoyment here! keep up the good work.

Leave a Reply

Your email address will not be published. Required fields are marked *

*

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>