Life Time and Diffusion Length in Silicon

	Here are some values in tabulated form taken from data given by Wacker Siltronic.
		Note that the conversion between diffusion length L and lifetime t involves the diffusion constant D via L = (Dt)1/2  which in turn contains the mobility µ via D = (kT/e) · µ.
		The mobility µ, however, is a function of doping type and doping level. It comes as no surprise that the table must distinguish between doping type and level - and the differences can amount to a factor of 3!
		Diffusion- length L [µm] Carrier Lifetime [µs] n-type p-type 10 Wcm 100 Wcm 10 Wcm 100 Wcm 100 8 8 3 3 200 34 32 13 11 300 76 72 30 24 400 135 129 54 44 500 211 201 84 68 700 414 394 165 133 1 000 845 804 336 2723 5 000 21 121 20 109 8393 6 798

With frame

3.1.1 Silicon: General Properties and Technologies

© H. Föll (Semiconductors - Script)