The present invention provides methods for purifying a layer of carbon nanotubes comprising providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein the precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; selectively heating the first carbon nanotubes; and separating the first carbon nanotubes from the second carbon nanotubes, thereby generating a purified layer of carbon nanotubes. Devices benefiting from enhanced electrical properties enabled by the purified layer of carbon nanotubes are also described.

The present invention relates to metal complexes and electronic devices, in particular organic electroluminescent devices containing said metal complexes.

An apparatus for manufacturing an organic material includes an outer tube including an internal accommodating space, and at least one loading inner tube and at least one collecting inner tube disposed in the accommodation space, the loading inner tube including a mesh boat disposed in a first direction in which the loading inner tube extends.

The present disclosure relates to a method that includes preparing a mixture by dissolving at least two halide perovskite precursors in a first liquid, forming a halide perovskite crystal in the mixture by lowering a solubility limit of at least one of the halide perovskite precursors, and separating the halide perovskite crystal from the mixture, where at least one of the halide perovskite precursors contains an impurity, and the halide perovskite crystal is substantially free of the impurity.

Provided is a treatment method of an emitting layer raw material in an OLED, comprising steps of: (1) providing the emitting layer raw material, and the emitting layer raw material comprising a host and a dopant, and in a vacuum glove box with protective gas, adding the host, the dopant and anhydrous ethanol into a polytetrafluoroethylene lining to be mixed uniformly, and putting the lining in a high pressure autoclave to be treated at a temperature of 40 to 60 celsius degrees for 18 to 36 hours to obtain a treatment liquid; (2) centrifuging the treatment liquid to collect a precipitate, and drying the collected precipitate to obtain the emitting layer raw material after treatment. The resulting treated emitting layer raw material achieves sufficient mixing and dispersion of the host and the dopant, and does not affect the subsequent use of vacuum evaporation method to form an emitting layer.

A novel sublimation purification method is provided. Moreover, a novel sublimation purification apparatus is provided. A purification method using a purification apparatus including a purification portion where a substance is purified by vaporization, a temperature adjustment means, a gas supply means, and a gas discharge means is provided. In the purification method, the inside of the purification portion is made to have a first pressure with use of the gas discharge means, a temperature gradient is generated in the purification portion with use of the temperature adjustment means such that the substance is purified, the pressure in the purification portion is then set at a second pressure with use of the gas supply means, and the purification portion is cooled with use of the temperature adjustment means. The second pressure is higher than the first pressure and the second pressure is higher than or equal to an atmospheric pressure.

A novel light-emitting element or a highly reliable light-emitting element is provided. The light-emitting element includes an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes at least a light-emitting layer. The light-emitting layer includes at least a first organic compound and a second organic compound. The energy for liberating halogen from a halogen-substituted product of the first organic compound in a radical anion state and in a triplet excited state is less than or equal to 1.00 eV. The amount of halogen-substituted product in the second organic compound is not increased with an increase in driving time of the light-emitting element.

An organic material purification composition, a mixed composition, and a method of purifying an organic material, the organic material purification composition including an ionic liquid in which a cation and an anion are combined; and an organic solvent, wherein the organic solvent includes an alcohol or a ketone.

A process for purifying semiconducting single-walled carbon nanotubes (sc-SWCNTs) extracted with a conjugated polymer, the process comprising exchanging the conjugated polymer with an s-tetrazine based polymer in a processed sc-SWCNT dispersion that comprises the conjugated polymer associated with the sc-SWCNTs. The process can be used for production of thin film transistors and chemical sensors. In addition, disclosed herein is use of an s-tetrazine based polymer for purification of semiconducting single-walled carbon nanotubes (sc-SWCNTs).

A high-purity organometallic iridium complex is provided. The organometallic iridium complex includes iridium and a plurality of ligands cyclometallated to the iridium. Each of the plurality of ligands includes a heteroaromatic ring having a coordinatable nitrogen atom. In LC analysis of the organometallic iridium complex, an impurity which has a monochlorinated ligand among the plurality of ligands is 0.1% or less by quantitating using peak area count with a PDA detector.