Fig. 1: AIGS-AGS core–shell NCs. | Nature Communications

Fig. 1: AIGS-AGS core–shell NCs.

From: Coherent heteroepitaxial growth of I-III-VI2 Ag(In,Ga)S2 colloidal nanocrystals with near-unity quantum yield for use in luminescent solar concentrators

Fig. 1

a Schematic illustration of AIGS-AGS NC synthesis. Key reactants and chemical intermediates are depicted. b MALDI-TOF mass spectra of the reactants containing Ag, S, Ga, and ligands (oleic acid (OA) and oleylamine (OAm)) taken at different reaction temperatures (130 °C (top, cyan) and 50 °C (bottom, gray)). The colored background highlights the presence of Ag–S-Ga(OA)2 complex at the elevated temperature. The spectra are vertically shifted for visual clarity. c, d HR-TEM images of AIGS (X = 0.5, radius (r) = 1.8 nm)-AGS (shell thickness (l) = 2.9 nm) NCs. A NC is measured along the [110] axis. Z.A. means zone axis. e STEM-HAADF image and EDS elemental mapping of Ag (red), In (green), Ga (blue) and S (yellow) for AIGS (X = 0.9, r = 2.95 nm)-AGS (l = 2.7 nm) NCs. Scale bars in (c–e) are 5 nm. EDS analysis showing the compositional homogeneity among multiple individual AIGS-AGS NCs is presented in Supplementary Fig. 8. Source data are provided as a Source data file.

Back to article page