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Ternary cesium lead halides have multiple stable phases that can be formed; these include CsPbX 3 (perovskite), Cs 4 PbX 6 (so called "zero-dimensional" phase due to disconnected [PbX 6] 4-octahedra), and CsPb 2 X 5. [147] All three phases have been prepared colloidally either by a direct synthesis or via nanocrystal transformations. [148]
Methylammonium lead halides (MALHs) are solid compounds with perovskite structure and a chemical formula of [CH 3 NH 3] + Pb 2+ (X −) 3, where X = Cl, Br or I. They have potential applications in solar cells , [ 2 ] lasers , light-emitting diodes , photodetectors , radiation detectors, [ 3 ] [ 4 ] scintillator , [ 5 ] magneto-optical data ...
Crystal structure of CH 3 NH 3 PbX 3 perovskites (X=I, Br and/or Cl). The methylammonium cation (CH 3 NH 3 +) is surrounded by PbX 6 octahedra. [13]The name "perovskite solar cell" is derived from the ABX 3 crystal structure of the absorber materials, referred to as perovskite structure, where A and B are cations and X is an anion.
In particular, the O3-type NaNi 1/4 Na 1/6 Mn 2/12 Ti 4/12 Sn 1/12 O 2 oxide can deliver 160 mAh/g at average voltage of 3.22 V vs Na/Na +, [40] while a series of doped Ni-based oxides of the stoichiometry Na a Ni (1−x−y−z) Mn x Mg y Ti z O 2 can deliver 157 mAh/g in a sodium-ion "full cell" with a hard carbon anode at average discharge ...
They may also include density functional theory (DFT), molecular mechanics or semi-empirical quantum chemistry methods. The programs include both open source and commercial software. Most of them are large, often containing several separate programs, and have been developed over many years.
Perovskite (pronunciation: / p ə ˈ r ɒ v s k aɪ t /) is a calcium titanium oxide mineral composed of calcium titanate (chemical formula Ca Ti O 3).Its name is also applied to the class of compounds which have the same type of crystal structure as CaTiO 3, known as the perovskite structure, which has a general chemical formula A 2+ B 4+ (X 2−) 3. [6]
A common complex pseudohalide is a tetracarbonylcobaltate [Co(CO) 4] −. The acid cobalt tetracarbonyl hydride HCo(CO) 4 is in fact quite a strong acid, though its low solubility renders it not as strong as the true hydrogen halide. The behavior and chemical properties of the above pseudohalides are identical to that of the true halide ions.
Lead halide refers to any of a group of chemical compounds in which lead is joined to an element from the halide group. Compounds within this group include: