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The diffusion length for electrons L_n = 3.16| mu in an n-doped (N_d = 10^17 cm^-3)
semiconductor is known at a temperature T = 300K. The recombination lifetimes are also tau_p
= tau_n = 1.0 ns. Find the conductivity of the semiconductor.
Solution
conductivity = Ln * Nd/T
= 1.05 * 1000
= 1050 m-ohm-1
conduction time = 1.2 sec

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