APPENDIX D. IMPORTANT PROPERTIES OF SEMICONDUCTORS 537
LATTICE CONSTANTS AND BADGAPS OF SEMICONDUCTORS AT ROOM TEMPERATURE(^0) 5.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5
0.4
0.8
1.2
1.6
2.0
2.4 0.517
0.539
0.563
0.590
0.620
0.652
0.689
0.729
0.775
0.826
0.885
0.953
1.033
1.127
1.240
1.377
1.550
1.771
2.067
2.480
3.100
4.133
6.200
12.40
GaP AlAs
GaAs
InP
InSb
GaSb
AlSb
InAs
W
AVELENGTH IN
MICRONS
ENERGY GAP IN ELECTRON VOLTS
LATTICE CONSTANT IN ANGSTROMS
Direct Gap
Indirect Gap
6.0
5.0
4.0
3.0
2.0
1.0
3.0 4.0 5.0 6.0
LATTICE CONSTANT (Å)
ENERGY
GAP
(eV)
Direct bandgap
Indirect bandgap
Sapphire
AlN
GaN
MgS
ZnS
CdSe
InP
GaAs
MgSe
GaP
SiC
InN
AlP ZnSe
AlAs
Figure D.1: Lattice constants and bandgaps of semiconductors at room temperature.