Figure 4 | Scientific Reports

Figure 4

From: Self-defect-passivation by Br-enrichment in FA-doped Cs1−xFAxPbBr3 quantum dots: towards high-performance quantum dot light-emitting diodes

Figure 4

Peak-fitted XPS spectra of Cs1–xFAxPbBr3 QDs showing (a) N 1s core level and (b) Br 3d core level. (c) Relative ratio of elements including Cs, FA, Pb, and Br. (d) The changes of the anion to cation ratio [Br/(Cs + FA + Pb)] and the inner Br to surface Br ratio [(inner Br)/(surface Br)] in Cs1–xFAxPbBr3 QDs as a function of FA doping content.

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