Fig. 2: Chemical interactions and perovskite film quality. | Nature Communications

Fig. 2: Chemical interactions and perovskite film quality.

From: Rationally designed universal passivator for high-performance single-junction and tandem perovskite solar cells

Fig. 2

a XPS spectra of S 2p in the control and BGTS, VBETS, or LBETS-modified perovskite films. b, c XPS spectra of (b) Pb 4f and (c) I 3d in control and BGTS, VBETS, or LBETS modified perovskite films. d-f FTIR for (d) BGTS and BGTS+PbI2, (e) VBETS and VBETS+PbI2, and (f) LBETS and LBETS+PbI2. g, h Steady-state PL (g) and TRPL (h) spectra of the control, BGTS, VBETS, and LBETS-modified perovskite films on a bare glass substrate. i I-V curves of the devices based on ITO/SnO2/perovskite (BGTS, VBETS, and LBETS)/C60/Ag structure under dark.

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