Chemistry

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A p-n junction is obtained at a depth of 3×10−3 cm by diffusion of antimony (Sb) into p-type germanium. What is the acceptor concentration in the bulk Ge, if diffusion was carried out for three hours at 790∘ C?

Given:

Constant Sb surface concentration is 8×1018 cm3
The diffusivity of Sb in Ge at 790∘ C is 4.8×10−11 cm2/sec
Write answer in units of cubic centimeters, in scientific notation up to two decimal points

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