fig3
Figure 3. (A) Confocal PL mapping (5 μm × 5 μm) of perovskite films deposited on glass and varying SAM substrates; (B) TRPL spectra of perovskite films prepared on varying SAMs; (C) J–V curves of the champion tandem cell under reverse and forward scans; (D) The PCE of PSCs with bandgaps of 1.56, 1.66 and 1.77 eV, respectively. This figure is quoted with permission from[21], Copyright Springer Nature. PL: Photoluminescence; SAM: self-assembled monolayer; TRPL: time-resolved photoluminescenc; PCE: power conversion efficiency; PSCs: perovskite solar cells; TSC: tandem solar cell; VOC: open-circuit voltage; FF: fill factor; FFSQ: the Shockley-Queisser limit of FF.
