Question

The mobility of electron in Si at 300 K is 0.13 m2/V-s. Calculate the diffusion constant of
electron (kB = 1.38 × 10–23 J/K)
(1) 0.0034 m2/s (2) 0.0024 m2/s
(3) 0.0044 m2/s (4) 0.0054 m2/s

Answer 1

$$D_n=((k\times T)/q)\times μ= ((300\times1.38\times10^{-23})/(1.6\times10^{-19} ))\times0.13=0.0034(meter)^2/sec$$

Answer: (1)0.0034