1. Impurity orbits. Indium antimonide has E = 0.23 eV; dielectric constant e =electron effective mass m, = 0.015 m. Calculate (a) the donor ionization energy;(b) the radius of the ground state orbit. (c) At what minimum donor concentrationwill appreciable overlap effects between the orbits of adjacent impurity atomsoccur? This overlap tends to produce an impurity band-a band of energy levelswhich permit conductivity presumably by a hopping mechanism in which electronsmove from one impurity site to a neighboring ionized impurity site.18;

Given: Eg=0.23 eVε=18me=0.015mTo calculatea) Donor ionization energyb) The radius of the ground…

Answered: 1. Impurity orbits. Indium antimonide…

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