Fermi level, band structure of solids, and effect on electrical conduction

  • Thread starter solas99
  • Start date
  • #1
solas99
69
1
how is the relationship between fermi level and band structure of solids can effect electrical conduction properties of a material?
 

Answers and Replies

  • #2
ali.awarke
2
0
Hi,

The Fermi Level is the energy level of the valence electrons at 0 K. it is also the upper limit of the valence band. if the Fermi level is above the lower end of the conduction band (like metals), the valence electrons have enough energy to flow, and the material is thus a good conductor. If the Fermi level is separted from the lower end of the conduction band by a large gap, then the electrons do not have enough energy to escape their bonds (insulators). However, if this band gap is small (semi conductors), the electrons could be externally excited (eg., thermally, electric field) in order to jump into the conduction band and flow.

hope this helps

Ali
 
  • #3
solas99
69
1
:) thanks, nice and easy :P
 
  • #4
solas99
69
1
when calculating occupancy of a semiconductor material 50meV from conduction band at temperature T.

my question is: do i start by using the fermi dirac distrubution function? or is there something I am missing?
 
  • #5
ashwini017
1
0
hi,
i read somewhere that fermi level is situated at the middle of energy band gap for intrinsic semiconductors,above the center for n-type semiconductors and below the center for p-type semiconductors.i,however,am not able to understand the reason behind it.please help.
 

Suggested for: Fermi level, band structure of solids, and effect on electrical conduction

Replies
0
Views
354
  • Last Post
Replies
0
Views
383
  • Last Post
Replies
3
Views
754
Replies
5
Views
814
  • Last Post
Replies
6
Views
935
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
597
  • Last Post
Replies
6
Views
275
  • Last Post
Replies
2
Views
425
Top