A sample of germanium is made p-type by the addition of indium at a rate of one atom per 8 x 10° germanium atoms. The donor density is assumed zero and n = 5 x 1019 atoms per cubic meter at 300 K. (1) Given there are 8 x 1028 germanium atoms per cubic meter, then compute the acceptor atom density, Na. (ii) At 300 K doped germanium has an electron charge (9) of 1.6 x 1019 C and mobilities for the electron (µe) of 0.38 m²/Vs and for the hole (µn) 0.18 m²/Vs. Stating any assumptions, calculate the conductivity of a sample of p-type germanium with your acceptor density computed from (i) above.

A sample of germanium is made p-type by the addition of indium at a rate of one atom per 8 x 10° germanium atoms. The donor density is assumed zero and n = 5 x 1019 atoms per cubic meter at 300 K. (1) Given there are 8 x 1028 germanium atoms per cubic meter, then compute the acceptor atom density, Na. (ii) At 300 K doped germanium has an electron charge (9) of 1.6 x 1019 C and mobilities for the electron (µe) of 0.38 m²/Vs and for the hole (µn) 0.18 m²/Vs. Stating any assumptions, calculate the conductivity of a sample of p-type germanium with your acceptor density computed from (i) above.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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