Content for Perovskite

Perovskite

A perovskite is any material with the same type of crystal structure as calcium titanium oxide (CaTiO3), known as the perovskite structure, or XIIA2+VIB4+X2−3 with the oxygen in the edge centers. Perovskites take their name from the mineral, which was first discovered in the Ural mountains of Russia by Gustav Rose in 1839 and is named after Russian mineralogist L. A. Perovski (1792–1856). The general chemical formula for perovskite compounds is ABX3, where 'A' and 'B' are two cations of very different sizes, and X is an anion that bonds to both. The 'A' atoms are larger than the 'B' atoms. The ideal cubic structure has the B cation in 6-fold coordination, surrounded by an octahedron of anions, and the A cation in 12-fold cuboctahedral coordination. The relative ion size requirements for stability of the cubic structure are quite stringent, so slight buckling and distortion can produce several lower-symmetry distorted versions, in which the coordination numbers of A cations, B cations or both are reduced.

Toshiba’s Polymer Film-Based Perovskite Large-Area Photovoltaic Module Reaches Record Power Conversion Efficiency of 15.1%

“Toshiba Corporation (TOKYO: 6502), the world-leader in development of perovskite photovoltaic modules for next-generation solar power generation, has developed a new coating method for the perovskite layer that boosts power conversion efficiency (PCE) to 15.1% for Toshiba’s 703cm2 …

Germanium-lead perovskite LEDs: a new way to reduced toxicity

“Metal-halide perovskites are a new class of semiconductor materials for LED display and solar-energy harvesting. However, the best-performing devices are often made from lead (Pb)-based perovskites, whose toxicity may cause potential environmental concerns. To resolve the toxicity problem, an …

Lead-free perovskite solar cells - How fluoride additives improve quality

“Tin halide perovskites are currently considered the best alternative to their lead-containing counterparts, which are, however, still significantly less efficient and stable. Now, a team led by Prof. Antonio Abate from HZB has analysed the chemical processes in the perovskite …

ITMO Researchers Create Perovskite Chess Set That Glows in the Dark

“For today’s International Chess Day, a research team from ITMO’s School of Physics and Engineering presents a unique device – a chess set with light-emitting pieces that contain perovskite. The energy is delivered wirelessly into each piece using a …

Removing the lead hazard from perovskite solar cells

“Although a very promising solution for capturing solar energy, perovskite solar cells contain lead, which is toxic to the environment and a serious health hazard. EPFL scientists have now found a very elegant and efficient solution by adding a transparent …

Common Perovskite Superfluoresces at High Temperatures

“A commonly studied perovskite can superfluoresce at temperatures that are practical to achieve and at timescales long enough to make it potentially useful in quantum computing applications. The finding from North Carolina State University researchers also indicates that superfluorescence may …

Cutting Perovskite: Scientists Succeed in Shaping Microscopic Monocrystals Without Loss of Quality

“A research team that includes staff members of ITMO University has suggested a new method of processing miniature perovskite fragments. The method is cheap and makes it possible to fashion microcrystals into desired shapes for use in production of lenses …

Future of perovskite solar cells shines a little brighter

“Solar cells, which convert sunlight to electricity, have long been part of the global vision for renewable energy. Although individual cells are very small, when upscaled to modules, they can be used to charge batteries and power lights. If laid …

Solar energy collectors grown from seeds

“Engineers create seeds for growing near-perfect 2D perovskite crystals Rice University engineers have created microscopic seeds for growing remarkably uniform 2D perovskite crystals that are both stable and highly efficient at harvesting electricity from sunlight. Halide perovskites are organic materials …

Atom swapping could lead to ultra-bright, flexible next generation LEDs

“An international group of researchers has developed a new technique that could be used to make more efficient low-cost light-emitting materials that are flexible and can be printed using ink-jet techniques. The researchers, led by the University of Cambridge and …