RESEARCH / A0202
Suppressing solvent adducts via coordination competition enables scalable perovskite photovoltaics
Read the original paper · 10.1038/s41467-026-68439-8 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Fig.2 The Interactions between 2OH additives, solvents, and perovskite. a, In-situ GIXRD intensity maps of control and 2OH perovskite films during the gas quenching process. The orange circle highlights the PbI2-NMP solvent phase. b, FTIR spectra of pure PbI2, 2OH, and the PbI2- 2OH complex. c, FTIR spectra of pure FAI, 2OH, and FAI-2OH complex. d, FTIR spectra of pure NMP, 2OH, PbI2-NMP, and the PbI2-2OH-NMP complexes. e, The k3-weighted Fourier transforms in R-space of the EXAFS at the Pb LIII-edge of the PbI2-NMP, and 2OH-PbI2-NMP. f, XRD patterns of the pure PbI2, 2OH and the PbI2-2OH complex (left), pure FAI, 2OH and FAI- 2OH complex (right). Left panel: diamonds mark the PbI2 (001) reflection at 12.74°, whereas circles indicate the 9.91° peak of the PbI2–2OH one‐dimensional phase. Right panel: the bottom green trace is the simulated FAI reference, and squares denote the FAI (040) reflection at 25.69°. arb. units, arbitrary units.