Fig. 2: Formation kinetics, passivation effects, and regulation of carrier transport behavior of the B-2D perovskite.
From: A binary 2D perovskite passivation for efficient and stable perovskite/silicon tandem solar cells
In situ PL contour plots of perovskite films undergoing surface treatment with IPA (a) or 2D reactants in IPA for the fabrication of RP (b), ACI (c), and B-2D (d) layers. e PL spectra of each film. The dashed box in PL spectra encloses the characteristic peaks of the ACI structure. The grounded lines indicate the absence of the ACI phases from the back side of the perovskite film. f Energy level scheme of perovskite films with and without 2D layers stacked extracted from IPES and UPS data. g KPFM map of the B-2D perovskite film. The scale bar is 1 μm. h The statistical distribution of surface potential. i–l TPC mapping of WBG devices with or without post-treatment. The scale bar is 0.2 mm.
