Fig. 2: In situ WAXS and PL spectroscopy reveal the formation of nanoclusters during Cs-oleate and PbBr2 precursor mixing.
From: Antisolvent controls the shape and size of anisotropic lead halide perovskite nanocrystals
a Sketch of the in situ reaction cell for simultaneous small- and wide-angle X-ray scattering (SAXS, WAXS), and photoluminescence (PL) spectroscopy. b In situ PL data recorded in between injection of Cs-oleate into the PbBr2 precursor (t = 0 s) and antisolvent addition (t = 10 s). The PL maximum position at 446 nm and full width at half maximum (FWHM) = 40 nm do not change over time, while the PL intensity increases rapidly, saturating after 5 s. c Simultaneously recorded in situ WAXS data, showing the formation of the (0 4 0) and (2 0 2) CsPbBr3 Bragg reflections between 0.5 and 2 s after Cs-oleate injection. d PL intensity, WAXS peak intensity, and crystallite size as derived from a Scherrer analysis. Error bars correspond to the propagated standard error of the fitted WAXS peak width. Source data are provided as a Source Data file.
