Abstract: A colloid comprising a plurality of nanocrystals, each nanocrystal comprising rubidium, a group 11 element of the Periodic Table of Elements such as copper, silver or gold, and a halogen. A method for preparing said colloid via a room temperature ligand assisted re-precipitation (LAPP) method, wherein the ligand is an acidic ligand such as oleic acid. The precursor solution is formed in a polar organic solvent such as DMSO or DMF, and the precursor solution is contacted with a non-polar organic solvent and said ligand to precipitate the nanocrystals. A polymer comprising a plurality of nanocrystals, each nanocrystal having a particle size in the range of 1 nm to 50 nm; and a use of said colloid in optoelectronic devices, etc. are also disclosed.

Abstract: Aspects concern an organic metal-halide perovskite precursor including a divalent metal cation, a halide anion, and an alkylamine, wherein the divalent metal cation is connected to a nitrogen atom of the alkylamine via a covalent bond. Further aspects concern a process for the production of the organic metal-halide perovskite precursor and a perovskite ink including the organic metal-halide perovskite precursor and a non-coordinating solvent.

Abstract: Provided is a nanocrystal comprising a core comprised in a shell, wherein the core comprises a first material of a perovskite structure comprising a first organic cation not exceeding a molar weight of about 45 g/mol, a first divalent metal and a first counter anion, and, wherein the shell comprises a second material of a perovskite structure comprising a second organic cation having a molar weight between about 74 g/mol and about 187 g/mol, optionally the first organic cation, a second divalent metal and a second counter anion. Provided is further a matrix having the nanocrystal as defined above encapsulated therein.

Abstract: In various embodiments, an emission source may be provided. The emission source may also include a gain medium including a halide semiconductor material. The emission source may further include a pump source configured to provide energy to the gain medium.

Abstract: In various embodiments, an emission source may be provided. The emission source may also include a gain medium including a halide semiconductor material. The emission source may further include a pump source configured to provide energy to the gain medium. The halide semiconductor material may include a lead-free perovskite material.

Abstract: Provided is a nanocrystal comprising a core comprised in a shell, wherein the core comprises a first material of a perovskite structure comprising a first organic cation not exceeding a molar weight of about 45 g/mol, a first divalent metal and a first counter anion, and, wherein the shell comprises a second material of a perovskite structure comprising a second organic cation having a molar weight between about 74 g/mol and about 187 g/mol, optionally the first organic cation, a second divalent metal and a second counter anion. Provided is further a matrix having the nanocrystal as defined above encapsulated therein.

Abstract: In various embodiments, an emission source may be provided. The emission source may also include a gain medium including a halide semiconductor material. The emission source may further include a pump source configured to provide energy to the gain medium. The halide semiconductor material may include a lead-free perovskite material.

Abstract: The invention relates to spintronic materials, and in particular, to spintronic materials comprised of halide perovskite compounds. In various embodiments, the spintronic material comprises a solution processed halide perovskite compound. A method for forming the solution processed halide perovskite compound is also disclosed.

Abstract: The invention relates generally to perovskite materials, and in particular, to copper perovskite materials. The invention further relates to solid-state integrated, lightweight, photovoltaic or light-emitting devices with an active layer based on the copper perovskite materials.

Abstract: In various embodiments, an emission source may be provided. The emission source may also include a gain medium including a halide semiconductor material. The emission source may further include a pump source configured to provide energy to the gain medium.

Abstract: Electrically conductive polymer materials, such as mixtures of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(styrenesulfonate) (PSS) are combined with functionalized carbon nanotubes to form composites that exhibit increased electrical conductivity. Functionalized or non-functionalized carbon nanotubes combined with the same electrically conductive polymer materials are combined with non-conductive polymers to increase the electrical conductivity of the non-conductive polymer. The functionalized carbon nanotubes are functionalized with carboxyl and/or hydroxyl groups. The resulting materials are useful in methods of forming electrically conductive films and electrically conductive features.