Timeline for Range of Holes Flow in pn junction diode
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 22, 2016 at 7:44 | comment | added | scanny | It's a good semiconductor physics question. I don't know the answer unfortunately. | |
| Mar 22, 2016 at 7:03 | comment | added | Sohail Ahmed | Thank you. I want to ask when a free electron from ntype goes to ptype, would it leave a hole behind? If not why we say a hole is moved from n to p when a free electron is moved from n to p, and majority of electrons in n are "free" .Maybe some bonded electrons leave their place and go to ptype leaving a hole behind but majority of electrons are "free electrons" | |
| Mar 22, 2016 at 6:14 | comment | added | scanny | I don't understand your question, so you might want to clarify. But a couple things. The number of atoms in a PN junction is fixed. So the possible locations for holes is determined. Electrons can go in an out, and these can fill holes and leave holes, but the locations where holes can appear are "fixed". By using EMF (voltage), you can force a certain number of additional electrons in or out, which decreases or increases respectively, the "inherent" hole count. It's a good question whether "free" electrons (in excess of hole locations) can be accumulated in the junction. I expect they can. | |
| Mar 22, 2016 at 6:03 | comment | added | Sohail Ahmed | What if you have a bookshelf completely filled with books and there are some books placed onto the others or in the empty spaces in the shelf but not fixed? Is this creates a hole when one of them is taken out? | |
| Mar 22, 2016 at 5:59 | history | answered | scanny | CC BY-SA 3.0 |