This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ady states.
Electrons and holes drift in opposite directions because they have
opposite charges.
The two electrical currents formed by (i) electrons flowing in one
direction and (ii) holes flowing in the opposite direction, are
directed in the same direction.
In an intrinsic semiconductor, it is n0 = p0. Under illumination, it is
n = p. Thus n = n0 + n = p = p0 + p. (b) Incorrect. (c) Incorrect.
(d) Correct.
(e) Incorrect.
(f) Correct. (g) Correct. 3. (a) The sample is ptype, because the distance in energy between the hole quasiFermi level
and the valence band is smaller than the distance in energy between the electron quasi160 meV
Fermi level and the conduction band, F
V
C
F (where F
V
and C
360 meV).
F
(b) From derivations in parts (d) and (g) we can calculate the change in elec...
View
Full
Document
This note was uploaded on 03/25/2013 for the course EE 101 taught by Professor Assorted during the Spring '13 term at Rensselaer Polytechnic Institute.
 Spring '13
 assorted
 Volt

Click to edit the document details