Indium antimonide (InSb) is a semiconductor with a narrow band gap of 0.17eV and an intrinsic...

 

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Indium antimonide (InSb) is a semiconductor with a narrow band gap of 0.17eV and an intrinsic carrier concentration of 2x1016cm?3. The mobility of electrons in InSb is 78000cm2/V?s and their effective mass is 0.014m0, while the holes have a mobility of 1000cm2/V?s and a mass of 0.43mo (all at 300K). a) What is the Fermi level with respect to mid-gap in intrinsic InSb? (in A EF in eV) b) Suppose that we have a piece of InSb at 300K and we apply an electric field of 1000V/cm across it. What current density of electrons and holes would flow? J (in A/cm2): C) Now suppose that we disconnect the electric field, and instead heat up a small region of the InSb by 10K. What happens to the carrier concentration in this small region of the material? Express your answer as a n;(310K) ratio of ni in the heated material to ni in the material at room temperature.":(300K) d) Consider the relative fluxes of electrons and holes diffusing away from the hot region. What is the ratio between the electron diffusivity and the hole diffusivity? Dn/Dp Indium antimonide (InSb) is a semiconductor with a narrow band gap of 0.17eV and an intrinsic carrier concentration of 2x1016cm?3. The mobility of electrons in InSb is 78000cm2/V?s and their effective mass is 0.014m0, while the holes have a mobility of 1000cm2/V?s and a mass of 0.43mo (all at 300K). a) What is the Fermi level with respect to mid-gap in intrinsic InSb? (in A EF in eV) b) Suppose that we have a piece of InSb at 300K and we apply an electric field of 1000V/cm across it. What current density of electrons and holes would flow? J (in A/cm2): C) Now suppose that we disconnect the electric field, and instead heat up a small region of the InSb by 10K. What happens to the carrier concentration in this small region of the material? Express your answer as a n;(310K) ratio of ni in the heated material to ni in the material at room temperature.":(300K) d) Consider the relative fluxes of electrons and holes diffusing away from the hot region. What is the ratio between the electron diffusivity and the hole diffusivity? Dn/Dp