Optical Fiber Communications 4th Edition by Gerd Keiser

تمرين 8

Measurements show that the bandgap energy E g for GaAs varies with temperature according to the empirical formula
E g ( T ) 1.55 4.3 × 10 4 T
where E g is given in electron volts (eV).
( a ) Using this expression, show that the temperature dependence of the intrinsic electron concentration n i is
n i = 5 × 10 15 T 3/2 e 8991/ T
( b ) Using a computer, plot the values of n i as a function of temperature over the range 273 K T 373 K (0°C T 100°C).