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We studied the miniband dependence on the structural parameters and shape in type-II multilayer germanium (Ge)/silicon (Si) quantum dot superlattice (QDSL) solar cell. A maximum tunable range of ground-state energy is 19% by tuning layer distance down to 0.5 nm, whereas 24.5% is achieved by adjusting the horizontal dot-to-dot spacing down to 0.3 nm. The reduction of effective bandgap is severe for...
By simultaneously considering the enhancement of quantum confinement on the effective bandgap and minimum transition energy, the silicon (Si)/ silicon carbide (SiC) quantum dot superlattice (SiC-QDSL) with aluminum oxide (Al2O3-QDSL) passivation layer shows the high short-circuit current (Jsc) of 4.77 mA/cm2 in theoretical, which agrees with the Jsc of 4.75 mA/cm2 obtained in the experiment under...
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