The minority carrier life time and diffusion constant in a semiconducting materi

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Question
The minority carrier life time and diffusion constant in a semiconducting material are 100 ?s and 100 cm²/s respectively. The diffusion length of carriers is
Options
A. 0.1 cm
B. 0.01 cm
C. 0.0141 cm
D. 1 cm

Correct Answer

0.1 cm

Explanation

Diffusion length = sqrt(Carrier life time x Diffusion constant) = (100 x 10^-6 x 100)^0.5 = 0.1 cm.

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