Question

Consider a p-n junction diode which has 10²³ acceptor-atoms/m³ in the p-side and 10²² donor-atoms/m³ in the n-side. If the depletion width in the p-side is 0.16µm, then the value of depletion width in the n-side will be ______µm. (Rounded off to one decimal place)

Answer 1

Correct Answer: 1.6

Depletion Width Ratio

The depletion width ratio is given by: 

W_p / W_n = N_D / N_A

Substituting the Given Values

W_p / W_n = 10²² / 10²³ = 0.1

Rearranging for W_n

W_n = W_p / 0.1

W_n = 1.6 µm

Conclusion

Thus, the depletion width in the n-side is 1.6 µm.