Fig. 2: Effects of AAAH strategy on ligand exchange of PQDs. | Nature Communications

Fig. 2: Effects of AAAH strategy on ligand exchange of PQDs.

From: Enriching conductive capping by alkaline treatment of perovskite quantum dots towards certified 18.3%-efficient solar cells

Fig. 2

XRD pattern (a), FT-IR spectra (b), 1H NMR spectra (c), and histograms of carboxyl-to-hydroxyl group ratios (d) for MeBz-, MeBz/K2CO3-, MeBz/Me3SiOK-, and MeBz/KOH-based PQD solid films. Note that in (b), spectral ordinates on the left and right sides of the dividing line correspond to their respective transmittance ranges. Changes in ΔG values for MeBz hydrolysis in conventional neutral (e) and constructed alkaline (f) environments, referenced to the initial state of each system. g Fluence-dependent TRPL spectra of MeBz-, MeBz/K2CO3-, MeBz/Me3SiOK-, and MeBz/KOH-based PQD solid films. h Schematic comparison diagram of conventional and AAAH-based ligand exchange of PQDs using MeBz antisolvent.

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