Table 1. Technical details of two types of state-of-the-art 2T monolithic tandem solar cells.

	Perovskite-silicon tandem (17)	Perovskite- perovskite tandem (14)
Module efficiency	25.2%	23.1%
Low-bandgap cell	Silicon heterojunction (SHJ) cell	(FA, MA) (Sn, Pb) I3 perovskite solar cell
Recombination junction	AZO	AZO
Wide-bandgap cell	(Cs, FA) Pb (I, Br)3 perovskite solar cell	(Cs, FA, MA) Pb (I, Br)3 perovskite solar cell