Fig. 2: AIGS-AGS NCs with variable core compositions and shell dimensions.
a Schematic illustrations of the geometry (left) and potential profile (right) of AIGS-AGS NCs. Blue and red lines indicate the lowest quantized energy state for electron (1Se) and hole (1Sh), respectively. b TEM images (scale bars = 10 nm), c X-ray diffraction (XRD) patterns, and d UV–Vis absorption and PL spectra of AIGS (X = 0.5, r = 1.8 nm)-AGS NCs with varying shell thicknesses (0 ≤ l ≤ 2.9 nm). 2d plots of PL spectra are supported in Supplementary Fig. 9. The inset displays PL QYs as a function of shell thickness. The average (symbols) and standard deviation (error bars) are from multiple independent runs of the experiment (n = 30). e PL spectra, f energy gaps (1Se–1Sh) obtained from UV–Vis spectra (top) and PL QYs (bottom), and g their color coordinates of AIGS-AGS (l = 1.6 nm) NCs with varying In contents (0.2 ≤ X ≤ 0.9) (inset: a photographic image of AIGS-AGS NCs with varying In ratios (X = 0.2, 0.3, 0.5, 0.7, and 0.9 from the left)). Gray triangles in (f) represent our calculation results for which homogenously alloyed AIGS cores are taken into account. The average (symbols) and standard deviation (error bars) in the bottom panel of (f) are from multiple independent runs of the experiment (n = 10). Synthesis and experimental results for AIGS-AGS NCs with varying compositions and shell dimensions are detailed in the Methods section, and Supplementary Figs. 7–16. Source data are provided as a Source data file.
