121results about How to "Lower LUMO level" patented technology

The invention relates to a fluorescent blue light guest material and its preparation method and use and especially relates to a triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material and its preparation method and use. The triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material solves the problem that because of large difference of an electron donor and an acceptor, when the electron donor is increased, guest emission wavelength produces red shift so that stable and efficient blue guest luminescence cannot be realized. The blue light guest material has a structural formula shown in the description. The preparation method comprises 1, preparing PXZPhBr, PXZPhBr, PTZPhBr and DMACPhBr, 2, mixing the products obtained through the step 1 and tetrahydrofuran, adding n-butyllithium and diphenylphosphinous chloride into the mixture, adding hydrogen peroxide into the mixture, carrying out stirring and carrying out chromatography and recrystallization. The triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material is used for preparation of a thermal excitation delayed fluorescent electroluminescent device. The material utilizes short-axis modification strategy, effectively keeps a matrix triplet state energy level, has a donor-acceptor (D-A)-type molecular structure and balances carrier injection and transmission. The preparation method belongs to the field of fluorescent material preparation.

The invention provides an organic dye and a photoelectric conversion device with the same. The organic dye has a structure shown in the specification, wherein n is an integer from 3 to 11; a plurality of Xes are independent respectively and are selected from groups consisting of the following components and combinations thereof; R is respectively independent H, halogen atoms, C1 to C18 alkyl, C1 to C18 alkoxy, C3 to C18 heterocyclic alkyl, C3 to C20 aryl, C3 to C20 heterocyclic aryl, C3 to C20 alcyl or C3 to C20 cycloalkyl; R1 and R2 are respectively independent the H, the halogen atoms, the C1 to C18 alkyl, the C1 to C18 alkoxy, the C3 to C18 heterocyclic alkyl, the C3 to C20 aryl, the C3 to C20 heterocyclic aryl, the C3 to C20 alcyl or the C3 to C20 cycloalkyl, or the R1 is connected with the R2 to form a loop with 5 to 14 elements; R3 is respectively independent the H, the halogen atoms, nitryl, amido, the C1 to C18 alkyl, the C1 to C18 alkoxy, C1 to C18 alkyl sulfide, the C3 to C18 heterocyclic alkyl, the C3 to C20 aryl, the C3 to C20 heterocyclic alkyl, the C3 to C20 alcyl or the C3 to C20 cycloalkyl; and Z is hydrogen, alkali metal or quaternary ammonium salt.

The invention discloses a preparation method and an application of A-D-A type organic molecule/amphiphilic polymer composite nanoparticles, and relates to an application of organic molecules in the field of biological medicines. A non-fullerene receptor with an A-D-A structure, widely used in the organic photovoltaic field, has the unique advantages of easiness in structure adjustment, strong near-infrared light absorption capacity and low fluorescence quantum efficiency, and has the huge potential of being used as a photosensitizer for photo-thermal/photodynamic combined treatment. The organic molecule with the A-D-A structure is coated with an amphiphilic macromolecule to form the water-soluble composite nanoparticles, the composite nanoparticles show a high photothermal conversion efficiency and a high reactive oxygen generation capacity under irradiation of near-infrared laser with a certain wavelength, and mouse in-vivo experiments show that the water-soluble composite nanoparticles have an obvious inhibition effect on tumors. Therefore, the composite nanoparticles have great practical prospects and social values in the field of novel tumor treatment.

The invention belongs to the technical field of organic photovoltaic and discloses a spirofluorene group containing organic small molecule non-fullerene receptor material as well as a preparation method and application thereof. The structural formula of the organic small molecule non-fullerene receptor material is a formula I shown in the description. A 9,9'-spirobifluorene group is adopted as a core, furthermore a diazosulfide and alkly chain substituted thiophene group is introduced, cyanoindanone groups with intensive electron-withdrawing are connected with both ends of the group, and thusthe film morphology stability of the organic small molecule non-fullerene receptor material can be promoted. Due to introduction of the diazosulfide group, the energy level of a lowest unoccupied molecular orbital can be further reduced; and due to introduction of the thiophene group, on one hand, light absorption can be enhanced, and on the other hand, synthesis preparation can be facilitated. The molecule designing has the advantages of being simple in synthesis and simple and convenient in purification.

The invention belongs to the field of a photoelectric material and specifically relates to an organic electroluminescence material. The structural formula of the material is as defined in the specification, wherein R is a C1-C20 alkoxy group. The organic electroluminescence material has high LUMO energy level and low HOMO energy level and is beneficial to blue shift of emission wavelength of the material. The material also has high phosphorescence quantum efficiency and good dissolving property and processability. The invention also provides a preparation method of the organic electroluminescence material and an application of the organic electroluminescence material in an organic electroluminescent device.

The embodiment of the invention relates to an A-A type conjugated polymer based on isoindigo-blue and a preparation method and application thereof.The structural general formula of the A-A type conjugated polymer based on isoindigo-blue is shown in the description, wherein Ar is an aromatic compound fragment, and R is alkane of C1-C32, alkenyl of C2-C32 and alkyne or ether oxygen or alkyl chain amines or sulfydryl of C2-C32; n is an integer larger than or equal to 4 and smaller than or equal to 100.According to the A-A type conjugated polymer based on isoindigo-blue, the solubility is good, the light absorbance is strong, the absorption range is wide, the sunshine utilization rate is high, the LUMO energy level is low, the A-A type conjugated polymer can replace fullerene and derivatives thereof as an acceptor material for preparing a full-polymer organic light detector and an organic solar cell.

The invention provides a P-type organic semiconductor material, a preparation method and a display panel. According to the P-type organic semiconductor material, substituent groups are used for replacing hydrogen on a ring in a molecular structure, and the LUMO energy level of the obtained P-type organic semiconductor material is reduced. When the P-type organic semiconductor material is used as ahole injection layer and a hole transport layer of a light emitting device, the ability of the hole transport layer to form holes is enhanced, the injection of the holes from an anode to the hole transport layer is improved, and the hole mobility is improved accordingly, so that the driving voltage of the light emitting device can be reduced. On the other hand, the molecular structure planarization degree of the P-type organic semiconductor material is high, the hole mobility can be further improved, and hole injection and transmission are facilitated. The preparation method of the P-type organic semiconductor material provided by the invention is simple in synthesis steps and low in cost.

The invention discloses a 1, 2, 4-oxadiazole micromolecule main body material. The 1, 2, 4-oxadiazole micromolecule main body material contains one or multiple electrophilic 1, 2, 4-oxadiazoles which serve as electron acceptor units, wherein the tail ends of molecules are connected to electron donor units. The invention also discloses a preparation method of the micromolecule main body material. The preparation method is characterized in that a dibromo substituted intermediate, namely a 1, 2, 4-oxadiazole compound is prepared by using bromobenzonitrile as a reaction raw material, and then electron donor units are connected to the dibromo substituted intermediate, namely the 1, 2, 4-oxadiazole compound through Suzuki coupling reaction. The invention also discloses an application of the 1, 2, 4-oxadiazole micromolecule main body material. The 1, 2, 4-oxadiazole micromolecule main body material has relatively good solubility and film-forming property, relatively strong eletrophilicity, relatively low LUMO (Lowest Unoccupied Molecular Orbital) energy level and relatively high electronic mobility.

Quinoid compounds and a preparation method and applications thereof are disclosed. The general structure of the compounds is shown in the description. The structures of the compounds can be easily modified, and the compounds have characteristics of good molecular skeleton planarity, high self-assembling capability, low energy level of the highest unoccupied orbit (LUMO), narrow band gaps, and insensitivity to water and oxygen, and therefore the compounds as organic semiconductor materials can greatly improve hole and electron transmission capability so that the compounds are applied as n type(electron transmitting) materials and bipolar materials (capable of transmitting holes and electrons) into organic field effect transistors, organic solar cells, perovskite solar cells, organic thermoelectric and organic light-emitting devices, and the like.

The invention belongs to the field of photoelectric materials, and in particular relates to a blue ray organic electroluminescent material with the structural formula shown as P, wherein R is hydrogen atom or C1-C20 alkyl. The blue ray organic electroluminescent material has higher LUMO (lowest unoccupied molecular orbital) energy level and lower HOMO (highest occupied molecular orbital) energy level, is conducive to blue shift of material luminescent wavelength, and also has higher phosphorescence quantum efficiency and better dissolution properties and processing properties. The invention also provides a preparation method of the blue ray organic electroluminescent material and application of the blue ray organic electroluminescent material in organic electroluminescent devices.

The invention belongs to the field of photoelectric materials, and in particular relates to a blue ray organic electroluminescent material with the structural formula shown as P, wherein R is hydrogen atom or C1-C20 alkyl. The blue ray organic electroluminescent material has higher LUMO (lowest unoccupied molecular orbital) energy level and lower HOMO (highest occupied molecular orbital) energy level, is conducive to blue shift of material luminescent wavelength, and also has higher phosphorescence quantum efficiency and better dissolution properties and processing properties. The invention also provides a preparation method of the blue ray organic electroluminescent material and application of the blue ray organic electroluminescent material in organic electroluminescent devices.

The invention provides a phosphine-containing fused heterocyclic compound as well as a preparation method and an application thereof. The phosphine-containing fused heterocyclic compound has a structure as shown in a formula I, a formula II, a formula III, a formula IV or a formula V. The phosphine-containing fused heterocyclic compound provided by the invention has double phosphorus-oxygen bonds,and an electron-withdrawing or large-volume Ar3 group and an Ar4 group are introduced; therefore, the material has a low LUMO energy level, a high electron transport capability and a high thermal decomposition temperature, can be used as an electron transport material of a photoelectric device, reduces the driving voltage of the device, improves the current efficiency, maintains thermal stabilityin the preparation and use processes of the device, and prolongs the service life of the device.

The invention provides an organic electroluminescent material, a preparation method of the organic electroluminescent material and an organic electroluminescent device. The organic electroluminescent material has a general formula (P) as shown in the specification, wherein R1 is hydrogen atom, C1-20 linear alkyl, C1-20 branched alkyl, C1-20 linear alkoxy or C1-20 branched alkoxy. According to the organic electroluminescent material, 2-(2',4'-difluoro-3'-cyanophenyl) pyrimidine serving as a cyclometalated ligand and acetylacetone serving as an auxiliary ligand are adopted to synthesize a blue-light organic electroluminescent material iridium complex, and the illuminating color of the material is adjusted through chemical modification performed by introducing alkyl chain on the pyrimidine ring of the cyclometalated ligand, so that phosphorescence emission having blue emission wavelength and high luminescence efficiency can be obtained.

The invention belongs to the technical field of display, and particularly relates to a dithiophene compound as well as a preparation method and an application thereof. The dithiophene compound has a structure as shown in formula I) or formula II), dithiophene is used as a mother nucleus, the conjugated performance is good, an electron withdrawing group increasing the modification property of the mother nucleus is introduced, the LUMO energy level of the dithiophene compound is reduced, the thermal stability of the dithiophene compound is improved, and the solubility is improved; the preparation method is simple, the yield is high, the cost is reduced, the dithiophene compound can be applied to a n-type doping material, promotes the hole generation and carrier combination, can be applied toa hole transport material, promotes hole generation, improves the hole transport speed, and can be applied to an organic electroluminescent device to reduce driving voltage and keep use stability andthe luminous efficiency of the device, and a produced product is good in luminescence property and long in service life and has a good application prospect.

A polymer having a repeating unit represented by the following general formula (I) and a ferrocene-based reduction potential of −1.5 to −0.5 V as measured by a cyclic voltammetry method

The invention relates to a blue phosphorescent iridium metal complex and a preparation method thereof and an organic electroluminescent device. The blue phosphorescent iridium metal complex has a structural formula as shown in the specification, wherein R is hydrogen, alkyl with the carbon atom number of 1-20 or alkoxy with the carbon atom number of 1-20. The blue phosphorescent iridium metal complex uses 2-(2 ', 6'-di (trifluoromethyl) pyridine-4 '-yl) pyrimidine as a ring metal ligand body structure, 2 ,4-di (trifluoromethyl)-5-( pyridine-2 '-yl) pyrrole as an auxiliary ligand, pyrimidinyl is conducive to enhancement of the LUMO (lowest unoccupied molecular orbital) level, pyridyl and electron withdrawing trifluoromethyl groups on the ring are conducive to the reduction of the HOMO (highest occupied molecular orbital) level, the luminescence wavelength can be effectively shifted to blue, the mulecular luminescence efficiency is improved, and trifluoromethyl and the high field strength auxiliary ligand 2 ,4-di (trifluoromethyl)-5-( pyridine-2 '-yl) pyrrole can improve the luminescent properties. The complex used in the organic electroluminescent device can improve the light emitting performance of the organic electroluminescent device.

The present invention discloses an A-[pi]-A type conjugated semiconductor polymer based on pyridazino pyrroledione, and a preparation method thereof, wherein the structure formula of the conjugated polymer is defined in the specification, R1 is a C8-C24 alkyl chain, R2 is H or a C6-C12 alkoxy chain, and n is more than or equal to 1. According to the preparation method, a bithiophene-pyridazino pyrroledione dibromo monomer and a benzothiadiazole diboronic acid bis(pinacol)ester monomer are subjected to a Suzuki coupling reaction to prepare the conjugated polymer. According to the present invention, the advantages of the two units such as PPD and benzothiadiazole are combined, and the novel A-[pi]-A type semiconductor conjugated polymer capable of being subjected to solution processing is provided; and the molecule design of the semiconductor conjugated polymer is reasonable, the polymer has strong electron affinity and is expected to exhibit single electron transport property, and the semiconductor polymer can be used for organic thin film transistor devices.

The invention belongs to the field of synthesis of organic compounds, relates to a novel polymer applied to the field of organic semiconductor materials, and in particular relates to a benzo[b]thieno[3,2-b]benzo[b]thiophene disulfone monomer and a copolymer of the benzo[b]thieno[3,2-b]benzo[b]thiophene disulfone monomer. The benzo[b]thieno[3,2-b]benzo[b]thiophene disulfone monomer is a highly-symmetrical heteroatom-containing compound; sulfone is a strong electron withdrawing group and has very good planeness, so that the monomer can be used as a very good small-molecular acceptor material and can be applied to organic solar cells; the monomer has a very good luminous effect, so that the monomer can also be applied to light-emitting diodes.

The invention belongs to the field of photoelectric materials, and specifically relates to an organic electroluminescent material. A structural formula is shown in the description. In the formula, R represents alkyl of C1-C20. The organic electroluminescent material has a relatively high LUMO energy level and relatively low HOMO energy level, and is beneficial to blue shift of luminescent wavelengths of the material. The organic electroluminescent material also has relatively high phosphorescence quantum efficiency, relatively good solubility and processability. The invention also provides a preparation method of the organic electroluminescent material, and an application of the organic electroluminescent material in an organic electroluminescent device.

The invention belongs to the field of photoelectric materials, and specifically relates to an organic electroluminescent material. A structural formula is shown in the description. In the formula, R represents alkyl of C1-C20. The organic electroluminescent material has a relatively high LUMO energy level and relatively low HOMO energy level, and is beneficial to blue shift of luminescent wavelengths of the material. The organic electroluminescent material also has relatively high phosphorescence quantum efficiency, relatively good solubility and processability. The invention also provides a preparation method of the organic electroluminescent material, and an application of the organic electroluminescent material in an organic electroluminescent device.