ChemInform Abstract: SOLID‐STATE PROPERTIES OF MATERIALS OF THE TYPE CS4MX6 (WHERE M = TIN OR LEAD AND X = CHLORIDE OR BROMIDE)

Abstract

Zwei neue Verbindungen ‐(l) und (II) werden durch Fällung aus LÖ‐ sungen von Snx, (X: Br, Cl) in nahezu gesättigter Lösung von CsX in H2O oder Ethandiol‐(1 ,2) nach Abkühlen dargestellt und das Zustandsdiagramm des Systems CsBr‐Snßr, wird beschrieben.

On the origins of the green luminescence in the “zero-dimensional perovskite” Cs4PbBr6: conclusive results from cathodoluminescence imaging

“…The origin of the green photoluminescence however still remained the subject of much debate after, and especially during the last few years, especially since a proper understanding of this perovskite is critical if it is to be reliably used for light-emitting applications. 9 The two main theories in the literature for the origins of the green photoluminescence have revolved around defects in the Cs 4 PbBr 6 lattice, 1,[4][5][6]9,11,[18][19][20][21] or as we conclude below, CsPbBr 3 nanocrystal impurities 14,16,17,[22][23][24][25][26][27][28] as also originally suggested by Nikl et al 17 Whilst a recent literature review also seems to suggest there is stronger evidence for the theory of CsPbBr 3 impurities, further evidence is still needed to decidedly conclude on the origins of the photoluminescence of this interesting material. 7 The main argument in favour of the presence of CsPbBr 3 nanocrystal impurities being the origin of the green luminescence, has been that the different Cs phases (e.g.…”