An Organic–Inorganic Perovskitoid with Zwitterion Cysteamine Linker and its Crystal–Crystal Transformation to Ruddlesden‐Popper Phase

Abstract

We demonstrate synthesis of an ew low-D hybrid perovskitoid (a perovskite-like hybrid halide structure,y ellow crystals,P 21/n space group) using zwitterion cysteamine (2aminoethanethiol) linker,a nd its remarkable molecular diffusion-controlled crystal-to-crystal transformation to Ruddlesden-Popper phase (Red crystals,P nma space group). Our stable intermediate perovskitoid distinctly differs from all previous reports by way of aunique staggered arrangement of holes in the puckered 2D configuration with af ace-sharing connection between the corrugated-1D double chains.The PL intensity for the yellowphase is 5orders higher as compared to the red phase and the corresponding average lifetime is also fairly long (143 ns). First principles DFT calculations conform very well with the experimental band gap data. We demonstrate applicability of the new perovskitoid yellow phase as an excellent active layer in as elf-powered photodetector and for selective detection of Ni 2+ via On-Off-On photoluminescence (PL) based on its composite with few-layer black phosphorous.

Thick-Layer Lead Iodide Perovskites with Bifunctional Organic Spacers Allylammonium and Iodopropylammonium Exhibiting Trap-State Emission

“…Therefore, 0D (IdPA) 6 Pb 3 I 12 is the thermodynamically favored product, corroborated by the fact it is more dense (volume/density = 865.1) than (IdPA) 2 PbI 4 (volume/density = 326.8). Recently, a similar crystal-to crystal transformation was reported in a n = 1 perovskite with cysteamine . Furthermore, a second byproduct forms, that of a 1D perovskitoid with the formula (IdPA)­PbI 3 .…”

“…Stoichiometrically, (IdPA) 6 Recently, a similar crystal-to crystal transformation was reported in a n = 1 perovskite with cysteamine. 96 Furthermore, a second byproduct forms, that of a 1D perovskitoid with the formula (IdPA)PbI 3 . It belongs to the NH 4 CdCl 3 structure type, consisting of a 1D double ribbon of face-and edge-sharing [PbI 6 ] 4− octahedra (Figure 1).…”

Tolerance Factor for Stabilizing 3D Hybrid Halide Perovskitoids Using Linear Diammonium Cations

“…Similar edge-sharing dimers were also observed in 2D structures, − which provides even larger structural diversity to the new family. Other interesting structures of edge-shared dimers connected by one octahedron in corner-sharing have been reported using homopiperazine and 2-aminoethanethiol …”

“…Other interesting structures of edge-shared dimers connected by one octahedron in corner-sharing have been reported using homopiperazine 24 and 2-aminoethanethiol. 25 Here, we report the new 3D bromide compounds with a combination of corner-and edge-sharing. The basic units consist of dimers connected by edge-sharing; then they are connected by corner-sharing to form a 3D perovskitoid network.…”

Design of Active Defects in Semiconductors: 3D Electron Diffraction Revealed Novel Organometallic Lead Bromide Phases Containing Ferrocene as Redox Switches

“…[22][23][24] Reported are 1D perovskitoids, [25] but as well 2D and 3D structures are already available. [26][27][28] The electronic structure of the conduction and valence band is influenced by both constituents, the inorganic and the organic. [19,29] Due to the confinement of the charge carriers, the inorganic layers behave like quantum wells.…”