Background: Math & Physics undergrad
Reason for asking:
So I was trying to understand semiconductor diodes and realized it all hinged on the PN junction which in turn is worthy of attention because of the effect created by the depletion zone. As I continued on studying up on this I began...
Effect of Doping on Fermi Energy...
I was wondering if anyone could give me a clear answer on why doping a semi conductor raises or lowers the fermi energy depending on n or p type semi conductors. There seem to be a few standard ways of explaining this, some to do with charge conservation or...
Hi all
It can be shown that the product of the hole and electron concentration is constant at a given temperature in a semiconductor, as long as the Fermi level is in the ~middle of the gab.
When we dope semiconductors, do we use the above argument? I.e., does doping work because of this...
Addition of pentavalent impurities to Si will result in each dopant forming bonds with 4 si atoms and, so 1 atom of the dopant will be left out.
On adding a trivalent impurity, the dopant will form a bonds with 3 Si atoms...so how does an electron disappear to make a hole?
Why does the...
Somewhere I read that the reason of halo doping in the MOSFETs is to increase the average doping of channel as the channel length is scaled to lower values. But I think there should be more about why is it done only at the source drain junction, and not somewhere else randomly like at the...
Can someone tell me what Doping away from half Filling means? I see it everywhere. Although I can't find referance to it in Kittel or Mermin, although I might not be looking hard enough. I have and idea of what it is. Half filling refers to the doping where the Brillouin Zone is half holes and...
I understand the principle behind p and n type doping, but I don't understand how such a small amount, 1ppm, can cause such a massive change in the fermi energy.
as I understand it:
for the intrinsic case the number of electrons exactly matches the number of holes and the fermi energy...
How delocalization of the states in the valence band occurs. Can somebody explain how many kinds of localization of states are there in semiconductors.