Timeline for Physics behind depletion region?
Current License: CC BY-SA 4.0
11 events
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| May 28, 2018 at 14:05 | comment | added | creillyucla | Your question relates directly to the question of stability. You ask,"why don't mobile electrons neutralize positive ions?" The answer is that they don't because to do so would put the system out of equilibrium, or in other words that it would make the system unstable, and heat would then flow into the junction to undo those changes. My answer goes into detail about this concept. | |
| May 28, 2018 at 12:42 | comment | added | user3548563 | Moreover I dont understand this statement " The flaw in this reasoning is that the binding between an electron and a donor ion (or a hole and an acceptor ion) is so weak that, at normal temperatures, the rate at which thermal agitation will ionize a donor-electron (or acceptor-hole) pair is much higher than the rate at which an electron happens to get trapped by a donor ion (same for holes and acceptors " Could you please elaborate me little bit more. Thanks | |
| May 28, 2018 at 12:41 | comment | added | user3548563 | I wasnt talking particularly about stability, your answer is really great, but I still have one confusion left that after diffusion when the positive ions are formed on N-side, why not at room temperature when the electrons are mobile, they come and make those positive ions neutralized. | |
| May 28, 2018 at 3:21 | history | edited | creillyucla | CC BY-SA 4.0 |
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| May 27, 2018 at 19:04 | history | edited | creillyucla | CC BY-SA 4.0 |
deleted 5 characters in body
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| May 27, 2018 at 19:03 | comment | added | creillyucla | I think I understand your question better now. I've rewritten the answer accordingly. | |
| May 27, 2018 at 18:55 | history | edited | creillyucla | CC BY-SA 4.0 |
complete redesign
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| May 27, 2018 at 12:02 | comment | added | user3548563 | Why not these positive ions are neutralized by the negative electrons | |
| May 27, 2018 at 10:23 | comment | added | user3548563 | Yes second question is not related to the cross over further but it is related to the bulk of N-region electrons attitude towards positive ions in their N side. | |
| May 27, 2018 at 2:04 | comment | added | V.F. | I believe the second question (in your counting) is not about "further migration of electrons from N-type region across the depletion region to P-type region", but from the bulk of N-region toward positive ions on N-side of depletion region and from P-side of depletion region toward the bulk of P-region. | |
| May 26, 2018 at 18:53 | history | answered | creillyucla | CC BY-SA 4.0 |