【正文】 We find that So _______________________________________ We have For germanium, , Then or The ionization energy can be written as eV eV_______________________________________ We have For gallium arsenide, , Then The ionization energy is or eV_______________________________________(a) eV(b) eV(c) cm(d) Holes(e) eV_______________________________________(a) eV(b) eV(c) cm(d) eV_______________________________________(a) eV eV(b) cm(c) ptype_______________________________________(a) eV cm eV cm(b) eV eV cm_______________________________________(a) eV cm eV cm(b) eV eV cm_______________________________________(a) ptype(b) eV cm eV cm_______________________________________(a) cm cm(b) cm cm_______________________________________(a) eV(b) eV(c) cm(d) Holes(e) eV_______________________________________ eV cm cm cm(a) eV(b) eV(c) cm(d) Holes(e) eV_______________________________________(a) cm eV cm(b) eV cm cm eV eV cm_____________________________________(a) cm eV cm(b) eV