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A single crystal of Germanium is doped with 1018 Phosphorus atoms cm3. a) Does this make the Germanium more n-type or p-
Posted: Fri Apr 29, 2022 10:54 am
by answerhappygod
- A Single Crystal Of Germanium Is Doped With 1018 Phosphorus Atoms Cm3 A Does This Make The Germanium More N Type Or P 1 (195.66 KiB) Viewed 20 times
A single crystal of Germanium is doped with 1018 Phosphorus atoms cm3. a) Does this make the Germanium more n-type or p-type? Why? b) Sketch the band diagram of this material. Indicate the approximate position of the Fermi level and donor or acceptor states introduced by the phosphorus. c) Calculate the current that would be passed through this single crystal of Ge when 10 V is applied across it if it has a cross sectional area of 0.01 mm? and length of 1 cm. Assume the mobility of electrons is 3900 cm’N s and the mobility of holes is 1900 cm?N s. d) The optical response of Si and Ge are shown below. Using this information, explain why the conductivity of intrinsic Ge is higher than that of intrinsic Si. 10f 10 104 Ge Absorption Coefficient (cih 10 10 Si 10 LUL 10 500 1000 1500 2000 Wavelength (nm) e) Would shining red light (660 nm) increase the current driven through the Ge in part c? Why?