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With a 12 ppb (1 ppb = 1 x 10-7 weight%) doping of phosphorus in germanium, what is the value of conductivity in the saturation

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With a 12 ppb (1 ppb = 1 x 10-7 weight%) doping of phosphorus in germanium, what is the value of conductivity in the saturation range? Is phosphorus doped germanium an n-type or p-type semiconductor? Notes: In the periodic table, phosphorus is in the column right of germanium. Molecular weight of phosphorus 30.97 g/mol Mass density of germanium: 5.32 g/cm3 Mobility values Me=0.364 m2V-1s-1, Mp=0.190 m2V-1s-1 Charge of 1 electron q = 0.16 x 10-18 C Carrier density n = o / (9.Me+ qu) Avogadro's number N. = 0.6023 x 1024 mol-1

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