Described are luminescent components with excellent performance and stability. The luminescent components comprise a first element 1 including first luminescent crystals 11 from the class of perovskite crystals, embedded a first polymer P1 and a second element 2 comprising a second solid polymer composition, said second polymer composition optionally comprising second luminescent crystals 12 embedded in a second polymer P2. Polymers P1 and P2 differ and are further specified in the claims. Also described are methods for manufacturing such components and devices comprising such components.

This disclosure relates to an environmental-friendly and cost-efficient approach to synthesize CsPbBr.sub.3 powders in a large scale at room temperature with water. Using ultrasonication and centrifugation, CsPbBr.sub.3 nanocrystals can be obtained with green (?522 nm) and blue (?493 nm) emissions from the powders. The photoluminescence quantum yield of the blue-emitting nanocrystals is 80%, which is much larger than 61.4% of the CsPbBr.sub.3 nanocrystals made by an anti-solvent method. The green-emitting nanocrystals exhibit better stability than those made by the anti-solvent method over a period of 9 days. The method opens a new avenue to potentially produce inorganic and/or inorganic-organic hybrid halide perovskite nanocrystals without harmful organic solvents used in precursor solutions.

A method of producing perovskite nanocrystalline particles using a liquid crystal includes a first operation for preparing a mixed solution including a first precursor compound, a second precursor compound, and a first solvent. a second operation for preparing a precursor solution by adding an organic ligand to the prepared mixed solution, a third operation for performing crystallization treatment after adding the prepared precursor solution to a reactor containing a liquid crystal, and a fourth operation for separating the perovskite nanocrystalline particles from the crystallized solution through a centrifugal separator.

Bandgap-tunable perovskite compositions are provided having the formula CsPb(A).sub.xB.sub.y).sub.3, wherein A and B are each a halogen. The mixed halide perovskite composition has a morphology which suppresses phase segregation to stabilize a tuned bandgap of the mixed halide perovskite composition. For example, the perovskite may be in the form of nanocrystals embedded in a non-perovskite matrix, which, for example, may have the formula Cs.sub.4Pb(A).sub.xB.sub.y)6, wherein A and B are each a halogen. Solar cells and light-emitting diodes comprising the mixed perovskite compositions are also provided.

A nanocrystal film product formed by one-step ligand exchange includes at least one dimension greater than 100 nm and ordered nanocrystals characterized as having a domain size of greater than 100 nm.

A nanocrystal film product formed by one-step ligand exchange includes at least one dimension greater than 100 nm and ordered nanocrystals characterized as having a domain size of greater than 100 nm.

A main object of the present disclosure is to provide a novel cathode active material that may be used for a fluoride ion battery. The present disclosure achieves the object by providing a cathode active material used for a fluoride ion battery, comprising a composition represented by Pb.sub.2xCu.sub.1+xF.sub.6, wherein 0x<2.

Systems and methods discussed herein relate to PbSe based thermoelectric materials for use in thermoelectric applications, the thermoelectric materials may comprise one or more dopants and are ball-milled into a powder and hot-pressed to form pressed components. The pressed components comprise improved room temperature properties, including a ZT above about 0.5 from about 300 K to about 780 K, which leads to improved device efficiency and overall function.

The invention is directed to a radical improvement of the specific electrochemical and corrosive characteristics of a lead-acid battery without a drastic change in the process of battery producing. The lead-carbon metal composite material contains from 0.1 to 10% by weight of carbon, lead is the remainder, while the structure of the material contains carbon allotropic modifications from graphene to graphite. The method for material synthesizing is characterized in that lead or its alloys are melted in a melt of alkaline and/or alkaline earth metal halides containing from 1 to 20 wt. % of metal carbides or non-metals with a particle size of 100 nm to 200 ?m, or solid organic substances, for 1-5 hours at a temperature of 700-900? C.

A perovskite-based photoelectric functional material having a general formula M.sub.zA.sub.yBX.sub.z+y+2. The matrix of the photoelectric functional material is a perovskite material ABX.sub.3, M is an organic amphipathic molecule used as a modification component of the matrix, 0<z?0.5, 0<y?1, and y+z?1.