Fig. 2: Characterization of WBG perovskite films. | Nature Communications

Fig. 2: Characterization of WBG perovskite films.

From: Surface reconstruction of wide-bandgap perovskites enables efficient perovskite/silicon tandem solar cells

Fig. 2

a The XPS spectra of Pb 4f, b, c PL mapping of the control and nano-polishing treated perovskite films. d Normalized TRPL curves of the control and nano-polishing treated perovskite films. e, f The evolution of PL spectra as a function of illumination time of the control and nano-polishing treated perovskite films. g Schematic diagram of the ion migration measurements for perovskite films. h, i PL intensity of the control and nano-polishing treated perovskite films after aging under the electric field stress. The excitation source for the PL mapping test was a 488 nm laser.

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