Fig. 3: Iodide oxidation suppression and crystal growth regulation.
From: Entropy-driven strategy stabilizes photoactive halide perovskites for inverted solar cells
UV-vis absorption spectra of FAI/DMF solutions a without and b with 2NTD addition aged for different durations. c UV-vis absorption spectra and photographs of the aged FAI/DMF solution before and after 2NTD addition (inset: photographs to demonstrate the color change of the aged FAI solution before and after 2NTD addition). Time-dependent in situ-GIWAXS patterns of d the control and e 2NTD-modified perovskite films during spin-coating and annealing processes. Time-resolved integrated peak area intensity for f δ-phase and g α-phase of the control and 2NTD-modified samples. Surface SEM images of h the control and i 2NTD-modified perovskite films.
