Impeding anion exchange to improve composition stability of CsPbX3 (X = Cl, Br) nanocrystals through facilely fabricated Cs4Pb X6 shell

Impeding anion exchange to improve composition stability of CsPbX₃ (X = Cl, Br) nanocrystals through facilely fabricated Cs₄Pb X₆ shell

Shen Zhaohui^{1, 2}, Song Pengjie^{1, 2}, Qiao Bo^{1, 2}, Cao Jingyue^{1, 2}, Bai Qiongyu^{1, 2}, Song Dandan^{1, 2}, Xu Zheng^{1, 2}, Zhao Suling^{1, 2, †}, Zhang Gaoqian^{1, 2}, Wu Yuanjun³

The TEM images of (a) CsPbCl₃, (b) CsPbBr₃, (c) CsPbCl₃@Cs₄PbCl₆, and (d) CsPbBr₃@Cs₄PbBr₆ NCs. (e) XRD of CsPbX₃@Cs₄PbX₆ NCs.