Figure 5: Compositional variations at the nanoscale. | Nature Communications

Figure 5: Compositional variations at the nanoscale.

From: Structural and compositional dependence of the CdTexSe1−x alloy layer photoactivity in CdTe-based solar cells

Figure 5

(a) A 1D line profile in the z direction of the (b) APT 3D reconstructed data set for the 100 nm CdSe layer sample displaying the Te (green) and Se (purple) atoms, and 27.5% Te (green) and Se (purple) isosurfaces. (c) A 1D line profile in the z direction of the (d) APT 3D reconstructed data set for the 400 nm CdSe layer sample displaying the Te (green) and Se (purple) atoms, and a 24% Se isosurface. Proximity histograms for the 27.5% Te (e) and Se (f) isosurfaces for the 100 nm sample imaged in b. (g) Proximity histogram for the 24% Se isosurface shown in d. The error bars embedded in the 1D line profiles and proximity histograms are the s.e. (s) from counting statistics, , where c is the concentration of the element and N is the total number of ions. Minor uncertainties can occur from background levels and mass spectral peak overlaps. A detailed summary of the mass spectrum, mass spectral ranges and resulting compositions can be found in Supplementary Fig. 4 and Supplementary Table 2.

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