Search results
Results from the WOW.Com Content Network
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]
Perovskite structures are adopted by many compounds that have the chemical formula ABX 3. 'A' and 'B' are positively charged ions (i.e. cations), often of very different sizes, and X is a negatively charged ion (an anion, frequently oxide) that bonds to both cations.
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.
Silicate perovskite is either (Mg,Fe)SiO 3 (the magnesium end-member is called bridgmanite [1]) or CaSiO 3 (calcium silicate known as davemaoite) when arranged in a perovskite structure. Silicate perovskites are not stable at Earth's surface, and mainly exist in the lower part of Earth's mantle , between about 670 and 2,700 km (420 and 1,680 mi ...
Perovskite MAPbX 3 thin films have been shown to be promising materials for optical gain applications such as lasers and optical amplifiers. [137] [138] Afterwards, the lasing properties of colloidal perovskite NCs such as CsPbX 3 nanocubes, [19] [139] MAPbBr 3 nanoplatelets [113] and FAPbX 3 nanocubes [83] [82] were also demonstrated.
Perovskite light-emitting diodes (PeLEDs) are candidates for display and lighting technologies. Researchers have shown interest in perovskite light-emitting diodes (PeLEDs) owing to their capacity for emitting light with narrow bandwidth , adjustable spectrum , ability to deliver high color purity, and solution fabrication.
Ruddlesden-Popper (RP) phases are a type of perovskite structure that consists of two-dimensional perovskite-like slabs interleaved with cations.The general formula of an RP phase is A n+1 B n X 3n+1, where A and B are cations, X is an anion (e.g., oxygen), and n is the number of octahedral layers in the perovskite-like stack. [1]
Main page; Contents; Current events; Random article; About Wikipedia; Contact us