The electron and hole diffusion coefficients in silicon are D = 35 cm?is %3D and D, 12.5 cm/s, respectively. Calculate the electron and hole diffusion current. densities (a) if an electron concentration varies linearly from n 105 cm to n = 1016 cm-3 over the distance from x =0 to x = 2.5 um and (b) if a hole con- centration varies linearly fromp= 104 cm-3 to p=5 x 1015 cm-3 over the dis tance from x =0 to x =4.0 µm. %3D %3D %3! write the final answer below a) hole current density: electron current density
The electron and hole diffusion coefficients in silicon are D = 35 cm?is %3D and D, 12.5 cm/s, respectively. Calculate the electron and hole diffusion current. densities (a) if an electron concentration varies linearly from n 105 cm to n = 1016 cm-3 over the distance from x =0 to x = 2.5 um and (b) if a hole con- centration varies linearly fromp= 104 cm-3 to p=5 x 1015 cm-3 over the dis tance from x =0 to x =4.0 µm. %3D %3D %3! write the final answer below a) hole current density: electron current density
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Transcribed Image Text:The electron and hole diffusion coefficients in silicon are D, 35 cm²/s
%3D
and D,=12.5 cm2/s, respectively. Calculate the electron and hole diffusion current
densities (a) if an electron concentration varies linearly fromn= 105 cm-3 to
n = 1016 cm-3 over the distance from x =0 to x = 2.5 um and (b) if a hole con-
centration varies linearly from p = 1014 cm-3 to p 5 x 1015 cm-3 over the dis-
tance from x =0 to x 4.0 µm.
%3D
%3D
%3D
write the final answer below
a)
hole current density:
electron current density
b)
hole current density:
electron current density
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