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. 2016 Jan 2;138(3):1010–1016. doi: 10.1021/jacs.5b12124

Figure 2.

Figure 2

Optical and structural properties of different thicknesses of CsPbBr3 NPLs and the exchanged CsPbCl3 and CsPbI3 NPLs. (A–C) Three different thicknesses, with (A) 5 ML emitting at 2.70 eV, Stoke shift (Ss) = 0.11 eV, and fwhm = 0.11 eV; (B) 4 ML emitting at 2.76 eV, Ss = 0.12 eV, and fwhm = 0.17 eV; and (C) 3 ML emitting at 2.83 eV, Ss = 0.11 eV, and fwhm = 0.09 eV. (D,E) TEM and HRTEM image of 3 ML thick sample indicated a thickness of 1.8 nm. (F) Fine-tuning the PL of CsPbBr3 NPLs with anion-exchange reactions to CsPbCl3 and CsPbI3. Scale bar corresponds to 50 nm in D, and 2 nm in E.