40results about How to "Appropriate energy level" patented technology

The invention provides a thermal activation delayed fluorescent material and application of the thermal activation delayed fluorescent material to organic light emitting diodes. The chemical structureof the thermal activation delayed fluorescent material is shown as a formula (1). A group R in the formula (1) is a chemical group, and triphenylamine derivatives and carbazole derivatives are linkedwith one another to form the chemical group; the R is selectively a type of the certain carbazole derivatives, and the numbers of annular carbon atoms of the certain carbazole derivatives are 18. Thethermal activation delayed fluorescent material and the application have the advantages that donor groups of organic light emitting materials are modified, accordingly, the current carrier transportperformance of the donor groups can be greatly improved, and the organic light emitting materials are good in device performance when applied to blue light, deep blue light or white light; the thermalactivation delayed fluorescent material not only can be used as blue light dye, but also can be used as a host material for yellow light or green light dye; the problem of efficiency roll-off under the condition of high brightness can be solved when the thermal activation delayed fluorescent material is applied to the organic light emitting diodes with single light emitting layers, the structuresof white organic light emitting diode devices can be simplified, and the industrial production cost can be reduced.

The present invention relates to a pyrene derivative for an organic light-emitting element, a light-emitting element material containing the pyrene derivative, and a light-emitting element, and more specifically, to a soluble organic compound having excellent color purity and high brightness and light-emitting efficiency, and an OLED device using the same. Compounds are characterized by being represented by general formula (1).

The invention relates to a derivative containing bispyrenyl imidazole, and a preparation method and an application thereof. The bridging mode of the C2 atom and the N1 atom in an imidazolyl group is changed o form the derivative containing bispyrenyl imidazole, the structure of the derivative containing bispyrenyl imidazole is represented by formula (A) or formula (B), the derivative containing bispyrenyl imidazole is a novel blue light material, and the imidazolyl group is introduced to adjust the energy level structure and the electron transport property of the above compound. The derivative containing bispyrenyl imidazole can be used for making organic electroluminescent device as an organic electroluminescent material, and the made devices have the characteristics of high brightness, high efficiency and low driving voltage.

The invention provides a D-A type chlorinated conjugated polymer as well as a preparation method and application thereof. The chlorinated conjugated polymer molecule is prepared by the following steps: firstly carrying out a light-shielding reaction on thiophene units contained in different repeating units, an electron-donating monomer, an electron-withdrawing monomer and a catalyst in an organicsolvent system under the protection of an inert gas, and finally purifying by adopting column chromatography, thereby obtaining a target product. The D-A type chlorinated conjugated polymer has good electron transmission capability and good absorption in a visible light range, is applied to a donor material in an organic solar cell, and has good photovoltaic performance.

The invention discloses an organic small molecule acceptor material and its preparation method and application. Suzuki‑Miyaura coupling reaction starting from 2,7‑dibromobenzo[b]benzo[4,5]thieno[2,3‑d]thiophene (BTBT) and difluoro‑indandione , Friedel-Crafts reaction, Vilsmeier-Haack reaction and Knoevenagel condensation reaction to synthesize A-D-A type organic small molecule acceptor material, as shown in formula (I), the resulting material can be purified by recrystallization, and has good thermal stability. When it is applied to polymer solar cells, an energy conversion efficiency of 12.66% can be obtained under optimized device conditions, which has certain practical application value.

The present invention relates to an organic material comprising a spiro ring (benzo[de]anthracene-7.9'-fluorene) and an organic electroluminescent device using the same, and more specifically, to a new spiro ring that can be used in an organic electroluminescent device Type organic compounds and organic electroluminescent devices with excellent characteristics such as low power and high efficiency by using them.

The invention relates to a hole-transporting polymer containing benzyl alcohol groups and its application in perovskite solar cells, belonging to the field of perovskite solar cells. The object of the present invention is to provide a polymer hole transport material containing benzyl alcohol groups. The polymer main chain of this material is composed of triarylamine repeating units to ensure that it has a suitable HOMO energy level and hole mobility; the side chain introduces benzyl alcohol groups to improve the hydrophilicity of the polymer, which can realize calcium titanium The complete and uniform coverage of the mineral layer on the surface of its film. In addition, the repeating unit of the polymer is easy to synthesize, and the raw material is cheap, which reduces the development cost of the material. These are conducive to the application of such polymer hole transport materials in high-efficiency and large-area devices, and have good application prospects.

The invention discloses an organic n-type semiconductor polymer material based on naphthalimide-selenophene and its preparation method and application. Based on the long-chain naphthalimide as an electron-pulling unit, selenophene and its derivative diselenide The invention relates to an n-type organic conjugated polymer semiconductor material with electron-donating units and a preparation method thereof, and the application of the polymer as a cathode interface modification layer material in a perovskite solar cell. The n-type conjugated polymer semiconductor based on naphthalimide and selenophene derivatives disclosed by the present invention has the advantages of solution processing, high electron mobility, excellent thermal stability, and appropriate energy level, and is an ideal perovskite Solar cell cathode interface modification material.

The invention relates to a novel A-D-A conjugate small molecule and an application thereof in a photoelectric device. A novel D conjugate skeleton is synthesized through a one-pot method; each conjugate unit is a bridged bond; and different electron-withdrawing units are end groups. The conjugate small molecule has good absorption and appropriate energy level within a visible light range, is applied to a donor material and an acceptor material in an organic solar cell, and achieves excellent device efficiency.

The invention provides an aromatic amine derivative containing bifluorene and an organic electroluminescence device thereof, and relates to the technical field of organic photoelectric materials. The technical problem to be solved by the invention is the problem of poor stability of current hole transport materials and short service life of organic electroluminescent devices. The bifluorene-containing arylamine derivative of the formula I of the present invention uses bifluorene as a parent, and is connected to the arylamine through a single bond or a bridging group. The organic electroluminescent device of the present invention comprises an anode, an organic layer and a cathode, the organic layer is located between the anode and the cathode, and the organic layer contains the arylamine derivative containing bifluorene. The arylamine derivative containing bifluorene of the present invention has suitable energy level, higher hole mobility, better stability and better film-forming property, and the organic electroluminescent film containing the arylamine derivative The device has lower driving voltage, higher luminous efficiency and longer service life.

The application belongs to the field of organic materials, and relates to a spiro compound and its application as well as an organic electroluminescence device and an electronic device using the same. The spiro compound has a structure shown in formula 1: wherein, represents a chemical bond, and group A has a structure shown in formula 2; Ar 2 Selected from the group consisting of structures represented by formula a', formula b', formula c', and formula d'. The spiro compound of the present application is used as a hole transport material in OLED devices, and can obtain good device performance and lower voltage.

A phenanthroimidazole-based organic orange light small molecule, a preparation method and its application in electroluminescence devices belong to the technical field of organic electroluminescence. The present invention uses phenanthroimidazole as a donor and cyano-substituted p-phenylene vinylene as an acceptor. The phenanthroimidazole-based organic orange light small molecule of the novel D-π-A-π-D structure has very high fluorescence Quantum yield, good thermal stability and chemical stability, the evaporated film is flat and uniform, and can be used as a light-emitting layer in non-doped or doped organic electroluminescent devices (OLEDs). The prepared device has Low driving voltage, high current efficiency and external quantum efficiency and other characteristics, obtain good electroluminescence performance.