Matching of Silicon Thin-Film Tandem Solar Cells for Maximum Power Output
Figure 6
The normalized solar cell parameters are given for each measurement number. As the measurement number is linearly related to the difference in short-circuit current , the second scale is attached above. The sample is slightly mismatched. The total short-circuit current density (green symbols) is maximized when the subcell currents are approximately equal, close to , which does not correspond to AM1.5g-illumination conditions. Under the same current matching condition the fill factor (orange symbols) is minimal. The power (blue symbols) peaks for larger values of . A layer thickness adaption, specifically an increase of the top cell layer thickness, would result in a power increase.
