Revealing photoluminescence mechanisms of single CsPbBr₃/Cs₄PbBr₆ core/shell perovskite nanocrystals

Abstract

CsPbBr3/Cs4PbBr6 core/shell perovskite NCs were prepared with a cubic shape. The core CsPbBr3 are coated by a Cs4PbBr6 shell. The XRD, absorption spectra and PLE spectra were different from the simple mixtures of CsPbBr3 and Cs4PbBr6 in bulk.

Phase engineering of inorganic halide Cs–Pb–Br perovskites for advanced energy conversion

“…45 0D Cs 4 PbBr 6 /3D CsPbBr 3 composites with good lattice matching improve the stability of 3D CsPbBr 3 , including the formation of core/shell structures and heterostructures. 43,46–48 2D tetragonal CsPb 2 Br 5 perovskites 49 have a sandwich-like structure with a layer of Cs − ions inserted between the two adjacent Br–Pb layers as shown in Fig. 2d.…”

In situ formation of red perovskite nanocrystals for improved stability

“…The root cause of the poor stability of perovskite materials is their large ion structure and surface energy, which is reflected in the instability under oxygen, humidity, heat, light irradiation, and the color segregation of the halogen mixture of the same group. [7][8][9][10] In recent years, researchers have been searching for strategies that can steadily improve the poor stability of perovskite NCs. At present, various materials are used to coat and protect perovskites, such as TiO2, [11,12] AlOX, [13] and MOF.…”