Matching of Silicon Thin-Film Tandem Solar Cells for Maximum Power Output
Figure 1
Simulated current-power characteristics of the subcells (dash-dotted: top cell, dashed line: bottom cell) and of the combined hydrogenated amorphous/microcrystalline tandem solar cell (straight line). The output power is maximized to 11.6 mWcm−2 instead of 11.3 mWcm−2, corresponding to a gain of 2.6% when the currents of the subcells are power matched; that is, the currents are matched at the maximum power point (black) instead of the common current matching at zero voltage (gray). The total thickness of the simulated tandems was 1.5 μm.
