Fig. 16. (a) Maximum efficiency limits for a 2-T tandem solar cell and (b) panel. (c) Configuration of a 2-T PTSC. (d) Efficiency of narrow bandgap (NBG) Sn–Pb PSCs with a bandgap range of 1.17–1.3 eV. (e) Efficiency and VOC graph of large bandgap (WBG) Pb-based PSCs with a bandgap range of 1.7–1.8 eV. (f) PCE for 2-T and 4-T PTSCs over time. (a and b) Ref. 212.
