Matching of Silicon Thin-Film Tandem Solar Cells for Maximum Power Output

Figure 5

The current density difference Δ𝐽_SC=𝐽^top_SC−𝐽^bot_SC rises linearly as a function of the index  𝑛  of the measurement as postulated by (3). The gray dashed line is a linear fit. The AM1.5g-illumination conditions are most closely met for measurement number 𝑛=10, marked in red. The subcell currents are equal, Δ𝐽_SC=0 mA/cm², approximately for measurement number 𝑛=8.