Question

Problem 4 (25 points) Consider a silicon pn junction at T = 300 K, $N_A$ = 1x10$^{17}$ cm$^{-3}$, $N_D$ = 1x10$^{16}$ cm$^{-3}$. The minority carrier lifetimes are $\tau_n$ = 1 µs and $\tau_p$ = 1 µs. The minority carrier diffusion coefficients are $D_n$ = 25 cm$^2$/s, $D_p$ = 10 cm$^2$/s. $n_i$ = 1.5x10$^{10}$ cm$^{-3}$ $\frac{kT}{e}$ = 0.026V Low-level injection is defined to be when the minority carrier concentration at the edge of the space charge region becomes equal to one-tenth the majority carrier concentration. Determine the value of the voltage across the pn junction at which the limit of the low-level injection is reached.

          Problem 4 (25 points)
Consider a silicon pn junction at T = 300 K, $N_A$ = 1x10$^{17}$ cm$^{-3}$, $N_D$ = 1x10$^{16}$ cm$^{-3}$. The minority
carrier lifetimes are $\tau_n$ = 1 µs and $\tau_p$ = 1 µs. The minority carrier diffusion coefficients are
$D_n$ = 25 cm$^2$/s, $D_p$ = 10 cm$^2$/s. $n_i$ = 1.5x10$^{10}$ cm$^{-3}$
$\frac{kT}{e}$ = 0.026V
Low-level injection is defined to be when the minority carrier concentration at the edge of the
space charge region becomes equal to one-tenth the majority carrier concentration.
Determine the value of the voltage across the pn junction at which the limit of the low-level
injection is reached.

Problem 4 (25 points)
Consider a silicon pn junction at T = 300 K, NA = 1x10^17 cm^-3, ND = 1x10^16 cm^-3. The minority
carrier lifetimes are = 1 µs and = 1 µs. The minority carrier diffusion coefficients are
Dn = 25 cm^2/s, Dp = 10 cm^2/s. ni = 1.5x10^10 cm^-3
(kT)/(e) = 0.026V
Low-level injection is defined to be when the minority carrier concentration at the edge of the
space charge region becomes equal to one-tenth the majority carrier concentration.
Determine the value of the voltage across the pn junction at which the limit of the low-level
injection is reached.

Added by Angela S.

Question

Please give Ace some feedback