A method for preparing a perovskite solar cell is disclosed, which comprises the following steps: providing a first electrode; forming an active layer on the first electrode; and forming a second electrode on the active layer. Herein, the active layer can be prepared by the following steps: mixing a perovskite precursor and a solvent mixture to form a precursor solution, wherein the solvent mixture comprises a first solvent and a second solvent, the first solvent is selected from the group consisting of γ-butyrolactone (GBL), dimethyl sulfoxide (DMSO), 2-methylpyrazine (2-MP), dimethylformamide (DMF), 1-methyl-2-pyrrolidone (NMP), dimethylacetamide (DMAc) and a combination thereof, and the second solvent is an alcohol; and coating the first electrode with the precursor solution and heating the precursor solution to form the active layer.

The present disclosure provides a polymer, a quantum dots film layer and a preparation method thereof. The polymer includes a plurality of polymerized units, and each of the polymerized units includes a hydrophobic structure and a carrier transport structure. The hydrophobic structure is linked to the carrier transport structure via a bridge bond containing a functional atom, and the hydrophobic structure is provided with a first ligand. When the polymerized unit is broken at the bridge bond, a hydrophobic monomer containing the first ligand and a carrier transport monomer containing a second ligand are generated. The second ligand includes the functional atom, and the second ligand is stronger than the first ligand in coordination activity.

A composition for use as an electronic material. The composition contains at least one organic semiconducting material, and at least one electrically insulating polymer forming a semiconducting blend wherein the insulating polymer acts as a matrix for the organic semiconducting material resulting in an interpenetrating morphology of the polymer and the semiconductor material. The variation of charge carrier mobility with temperature in the semiconducting blend is less than 20 percent in a temperature range. A method of making a film of an electronic material. The method includes dissolving at least one organic semiconducting material and at least one insulating polymer into an organic solvent in a pre-determined ratio resulting in a semiconducting blend, depositing the blend onto a substrate to form a film comprising an interpenetrating morphology of the at least one insulating polymer and the at least one organic semiconductor material.

An organic light-emitting display apparatus including a first electrode disposed on a substrate; a pixel defining layer covering an edge of the first electrode; a layer disposed on the pixel defining layer, the layer including a fluoropolymer and contacting a top surface of the first electrode; a first organic functional layer including a first light emitting layer, the first organic functional layer having a lower surface contacting the top surface of the first electrode; and a second electrode disposed on the first organic functional layer.

The present application relates to an ink formulation, and preparation methods of functional layer of optoelectronic devices. The ink formulation includes a component A and a component B, the component A including a first liquid, the component B including a second liquid and a functional material dispersed in the second liquid, the first liquid having a boiling point at least 10° C. higher than a boiling point of the second liquid; the first liquid and the second liquid are immiscible and the solubility of the functional material in the second liquid is ≥1 g, the solubility of the functional material in the first liquid is ≤0.05 g, the density of the first liquid is greater than the density of the second liquid, and the ratio of the surface tension of the first liquid to the surface tension of the second liquid ranges from 0.8 to 1.2.

The present disclosure relates to a light-emitting diode including a first electrode and a second electrode facing each other; an electron transfer layer between the first electrode and the second electrode; and a light emitting material between the first electrode and the second electrode, wherein the electron transfer layer consists of anisotropic nanorods, and the long axes of the anisotropic nanorods are arranged at an angle of about 20 degrees to about 90 degrees with respect to an interface with an adjacent layer into which electrons are injected.

The present invention relates to a process for producing a layer of a crystalline A/M/X material, which crystalline A/M/X material comprises a compound of formula [A]a[M]b[X]c, wherein: [M] comprises one or more first cations, which one or more first cations are metal or metalloid cations; [A] comprises one or more second cations; [X] comprises one or more halide anions; a is an integer from 1 to 6; b is an integer from 1 to 6; and c is an integer from 1 to 18, wherein the process comprises disposing on a substrate a precursor composition comprising: (a) a first precursor compound comprising a first cation (M), which first cation is a metal or metalloid cation; and (b) a solvent, and wherein the solvent comprises: (i) a non-polar organic solvent which is a hydrocarbon solvent, a chlorohydrocarbon solvent or an ether solvent; and (ii) a first organic amine comprising at least three carbon atoms. Also described are compositions useful in the process of the invention.

A carbon nanotube aligned film as well as a preparation method and application thereof are disclosed. The preparation method includes: providing a carbon nanotube dispersion solution comprising a selected carbon nanotube, a polymer as a carbon nanotube dispersing agent and binding to the selected carbon nanotube, an aromatic molecule binding to the selected carbon nanotube and allowing the surface of the selected carbon nanotube to have the same charges and an organic solvent being at least used for cooperating with the rest components of the dispersion solution to form uniform dispersion solution; and introducing a water phase layer to the upper surface of the dispersion solution to form a double-layer liquid phase system, partially or completely inserting a base into the double-layer liquid system, and then pulling out the base so as to form the carbon nanotube aligned film on the surface of the base.

An object of the present invention is to provide a film forming method for an organic semiconductor film, with which an organic semiconductor film having good uniformity and high mobility can be manufactured with good productivity. A coating liquid is prepared by dissolving an organic semiconductor material in a solvent, the coating liquid is sprayed by a spray unit, and the coating liquid is applied onto a temperature-controlled substrate while the coating liquid during the flight which has been sprayed by the spray unit is being heated, whereby problems are solved.

The present invention relates to a method for forming an organic element of an electronic device having at least two different pixel types including a first pixel type (pixel A) and a second pixel type (pixel B), —wherein at least one layer of pixel A is deposited by applying an ink A containing at least one organic functional material A and at least one solvent A by a printing process, —wherein at least one layer of pixel B is deposited by applying an ink B containing at least one organic functional material B and at least one solvent B by a printing process, —wherein at least one organic functional material A and at least one organic functional material B are different, and —wherein at least one solvent A and at least one solvent B are different, characterized in that both inks, ink A and ink B, in addition contain at least one common solvent S, and characterized in that the boiling point of solvent A and the boiling point of solvent B is at least 10° C. lower than the boiling point of the common solvent S.