Engineering, 16.04.2020 02:53 ijohnn15

The semiconductor is a homogeneous, p-type material in thermal equilibrium for t ≤ 0. The excess minority carrier lifetime is 10^-6 ns. At t = 0, an external source is turned on which produces excess carriers uniformly at rate of g'=1020 cm^-3s^-1. At t = 210^-6 s , the external source is turned off.

(a) Derive the expression for the excess-electron concentration as a function of time for 0 ≤ t ≤[infinity].

(b) Determine the value of excess electron concentration at (i) t = 0, (ii) t = 210^-6 s , (iii) t = 3*10^-6 s and (iv) t = [infinity].

(c) Plot the excess electron concentration as a function of time.

Answers: 3

Show answers

Other questions on the subject: Engineering

Engineering, 03.07.2019 15:10, brooklyn674

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

Answers: 3

continue

Engineering, 03.07.2019 15:10, margaret1758

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Answers: 1

continue

Engineering, 04.07.2019 18:10, viicborella

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Answers: 1

continue

Engineering, 04.07.2019 18:10, Talos02

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Answers: 2

continue

You know the right answer?

The semiconductor is a homogeneous, p-type material in thermal equilibrium for t ≤ 0. The excess min...