Below is a list of semiconductor materials and their bandgaps. Eg[eV] Si 1.1 GaAs 1.4 GaSb 0.81 GaP 2.3 InAs 0.36 (a) Based solely on bandgap energy, which of these materials could possibly be used to...

Below is a list of semiconductor materials and their bandgaps.

Eg[eV]

Si 1.1

GaAs 1.4

GaSb 0.81

GaP 2.3

InAs 0.36

(a) Based solely on bandgap energy, which of these materials could possibly

be used to make a detector for the light from a GaAs laser?

(b) Which of the following ternary compounds could possibly be used to

make a detector for the light from a GaAs laser?

GaAs(1−x)Sbx GaAs(1−x)Px Ga(1−x)InxAs

(c) If a reverse biased Si photodiode with a quantum efficiency of η = 80%

and an area of 1 cm2 is uniformly illuminated with the light from a GaAs

laser to an intensity of 10 mW/cm2 what is the photocurrent which flows?