Covalent-Network Solids (Section)
GaAs and GaP make solid solutions that have the same crystal structure as the parent materials, with As and P randomly distributed throughout the crystal. GaPxAs1- x exists for any value of x. If we assume that the band gap varies linearly with composition between x = 0 and x = 1, estimate the band gap for GaP0.5As0.5. (See the previous two exercises for GaAs and GaP band gaps.) What wavelength of light does this correspond to?
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