Calculate the conduction and valence band offsets in a GaAs/Ga$_{0.47}$In$_{0.53}$As heterojunction assuming that 60% of the bandgap discontinuity is in the valence band. What devices would such a heterostructure be useful for?
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Let's assume the bandgap of GaAs is 1.42 eV and the bandgap of GaInAs is 0.75 eV. The conduction band offset (ΔEc) can be calculated as the difference between the conduction band edge of GaInAs and GaAs. In this case, ΔEc = Ec(GaInAs) - Ec(GaAs) = 0.75 eV - 1.42 Show more…
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