Fig. 2: Surface morphology and photoluminescence properties of perovskite with different treatments. | Nature Communications

Fig. 2: Surface morphology and photoluminescence properties of perovskite with different treatments.

From: Enhanced charge carrier transport and defects mitigation of passivation layer for efficient perovskite solar cells

Fig. 2: Surface morphology and photoluminescence properties of perovskite with different treatments.

a–c 3D AFM mapping images of a pristine perovskite, b perovskite with PPAI unary post-treatment and c perovskite with BSPT, respectively. d Steady-state photoluminescence characterization of pristine perovskite, perovskite with PPAI unary post-treatment and perovskite with BSPT. e TRPL characterization of pristine perovskite, perovskite with PPAI unary post-treatment and perovskite with BSPT. f Transient reflection spectroscopy measurements of pristine perovskite, perovskite with PPAI unary post-treatment and perovskite with BSPT, respectively, using 700 nm pump light to excite the films. ΔR means change in reflection. g–i PL mapping patterns of g pristine perovskite film, h perovskite with PPAI unary post-treatment and i perovskite with BSPT. ssPL, TRPL, TRS and PL mapping characterization were carried out on glass/perovskite/passivation layer structure. a.u. arbitrary units.

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