Highly phase-pure, two-dimensional, multilayered organic-inorganic hybrid, halide perovskites are provided. Also provided are optoelectronic devices that incorporate the halide perovskites as photoactive materials.

A light-emitting diode display including a substrate having a driving circuitry and a plurality of light emitting diode structures disposed on the substrate. Each light-emitting diode structure has a light emitting diode with a light emission zone having a planar portion, and a pigmentless light extraction layer of a UV-cured ink disposed over the light-emitting diode. The light extraction layer has a gradient in index of refraction along an axis normal to the planar portion, and the index of refraction of the light extraction layer decreases with distance from the planar portion.

A technique comprising: producing an unencapsulated stack of layers (10) defining one or more electronic devices including an organic semiconductor element; and then subjecting the unencapsulated stack of layers to a water removal treatment in a vacuum oven (12) in the presence of an external water adsorbent (14); wherein the water removal treatment comprises heating the unencapsulated stack of layers in the vacuum oven for a time period longer than a control time period at which a spike in oven pressure attributable to the release of water from the stack of layers would occur with heating under the same treatment conditions but without the water absorbing material.

The present invention relates to processes for separating mixtures containing enantiomers of metal complexes with aromatic and/or heteroaromatic ligands, to metal complexes and to electronic devices, especially organic electroluminescent devices, comprising these metal complexes.

According to example embodiments, a method includes dispersing carbon nanotubes in a mixed solution containing a solvent, the carbon nanotubes, and a dispersant, the carbon nanotubes including semiconducting carbon nanotubes, the dispersant comprising a polythiophene derivative including a thiophene ring and a hydrocarbon sidechain linked to the thiophene ring. The hydrocarbon sidechain includes an alkyl group containing a carbon number of 7 or greater. The hydrocarbon sidechain may be regioregularly arranged, and the semiconducting carbon nanotubes are selectively separated from the mixed solution. An electronic device includes semiconducting carbon nanotubes and the foregoing described polythiophene derivative.

A method for producing an organic charge transporting film. The method comprises steps of: (a) applying to a substrate a first polymer resin which has substituents which are sulfonic acids, sulfonic acid salts or esters of sulfonic acids; and (b) applying over the first polymer resin a second polymer resin having M.sub.w at least 3,000 and comprising arylmethoxy linkages.

A method for room-temperature fabrication of an organolead halide perovskite film includes: forming a PbX2.(L)y film based on solid-gas reactions between ligand (L) vapor and a PbX2 film at room temperature; forming a perovskite film by exposing the PbX2.(L)y film to a solution of organic ammonium halide at room temperature; removing the perovskite film from the solution of organic ammonium halide; washing the perovskite film; drying the perovskite film; exposing the perovskite film to a methylamine/alcohols gas mixture; removing the perovskite film from the methylamine/alcohols gas mixture; and drying the perovskite film.

Organic metal compounds and organic light-emitting devices employing the same are provided. The organic metal compound has a chemical structure of Formula (I) or Formula (II):

##STR00001##

wherein X is O or S; L is

##STR00002##

R.sup.12 is

##STR00003##

and, n is 0, 1, or 2.

Detectors and methods of forming the same include aligning a semiconducting carbon nanotubes on a substrate in parallel to form a nanotube layer. The aligned semiconducting carbon nanotubes in the nanotube layer are cut to a uniform length corresponding to a detection frequency. Metal contacts are formed at opposite ends of the nanotube layer.

The present teachings relate to various embodiments of an hermetically-sealed gas enclosure assembly and system that can be readily transportable and assemblable and provide for maintaining a minimum inert gas volume and maximal access to various devices and apparatuses enclosed therein. Various embodiments of an hermetically-sealed gas enclosure assembly and system of the present teachings can have a gas enclosure assembly constructed in a fashion that minimizes the internal volume of a gas enclosure assembly, and at the same time optimizes the working space to accommodate a variety of footprints of various OLED printing systems. Various embodiments of a gas enclosure assembly so constructed additionally provide ready access to the interior of a gas enclosure assembly from the exterior during processing and readily access to the interior for maintenance, while minimizing downtime.