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semiconductor conductivity, KE, PE - Coggle Diagram
semiconductor conductivity
Instrinsic semiconductors
pure material semiconductor
Group 4 materials
compound semiconductors
3-5
2-4
conduction band electron = valence band hole
n=p
Number of charge carriers
intrinsic conductivity
n increase with T
more n, more conductivity
Extrinsic Semiconductor
n-type semiconductor
valence of 5
P, As
conduction electron
n>>p
p-type semiconductor
hole
majority carrier
B
p>>n
Solid solubility in Si
Same T, more solubility
Carrier mobility vs Dopant content
holes
effective mass
electrons
Carrier mobility vs Temperature
high temperature; more scattering; lower mobility
Electrical conductivity
metal
decrease with T
interaction of electrons with lattice
semiconductor
insulator
increase with T
concentration of carrier increase
KE, PE
Potential energy
Q*V(x)
Voltage
mirror reflection
Total energy
collision
workfunction
energy required to extract a conduction electron from a metal into vaccum