NEST2022PhysicsSemiconductors
An unbiased silicon based p-n junction along with the net charge density profile is shown in the figure. The n and p sides are doped with phosphorus and boron atoms respectively, each of density 10²² ~m ⁻³ . Taking x_n=3.3 10⁻⁷ ~m and relative permitivity of silicon to be 11.7 , select the correct statement(s):
Options
- AThe electric field is in the negative x -direction.
- Bx_p=3.3 10⁻⁷ ~m
- CThe magnitude of the electric field at x=0 is 4.9 10^6 ~V ~m ⁻¹ .
- DThe magnitude of the electric field from x_n to x_p decays exponentially.
Correct answer
C. The magnitude of the electric field at x=0 is 4.9 10^6 ~V ~m ⁻¹ .
Step-by-step solution
No solution available.