3.11 Light Emitting Diode
1/16
1.
III-V, II-VI, and IV group materials are
widely used.
2.
For GaAs P (y < 0.45), direct E , red,
1-y y
g
infrared.
3.
For GaAs P (y > 0.45), indirect E , with N,
1-y y
g
E appears and E ' < E , green, yellow,
N
g
g
orange.
4.
For GaN, InGaN, SiC:Al, ZnSe, blue.
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