149results about How to "Lower HOMO level" patented technology

Ligand compositions for use in preparing discrete coated nanostructures are provided, as well as the coated nanostructures themselves and devices incorporating same. Methods for post-deposition shell formation on a nanostructure, for reversibly modifying nanostructures, and for manipulating the electronic properties of nanostructures are also provided. The ligands and coated nanostructures of the present invention are particularly useful for close packed nanostructure compositions, which can have improved quantum confinement and / or reduced cross-talk between nanostructures. Ligands of the present invention are also useful for manipulating the electronic properties of nanostructure compositions (e.g., by modulating energy levels, creating internal bias fields, reducing charge transfer or leakage, etc.).

Objects of the present invention are to provide: a light-emitting element having a long lifetime and good emission efficiency and drive voltage. One embodiment of the invention is a light-emitting element including, between an anode and a cathode, at least a stack structure in which a first layer, a second layer, and a light-emitting layer are provided in order from the anode side. The first layer includes a first organic compound and an electron-accepting compound. The second layer includes a second organic compound having a HOMO level differing from the HOMO level of the first organic compound by from −0.2 eV to +0.2 eV. The light-emitting layer includes a third organic compound having a HOMO level differing from the HOMO level of the second organic compound by from −0.2 eV to +0.2 eV and a light-emitting substance having a hole-trapping property with respect to the third organic compound.

The invention discloses a donor-acceptor type fluorenyl nanometer grid material, a preparation method and application thereof. The nanometer grid material is of a square-ring-shaped rigid structure formed through alternative arrangement of fluorenyl ramification regarded as electron donor units and electron acceptor units. The preparation method comprises the following steps that a precursor with tertiary alcohol and aromatic nucleus terminal based hydrogen inhibitor dual binding sites is dissolved in organic solvent; at the room temperature, a catalyst is added, and stirring and reacting are conducted; and the reaction is conducted for 5 min-12 h, and products are obtained through chromatogram column separation. The donor-acceptor type fluorenyl nanometer grid material has the advantages that the compounding method is modularized, extensibility and stability of thermology, electrochemistry and photology are high; dependency of thin film solvent is reduced; large-area soluble processing is achieved; the size of apertures is accurately regulated and controlled; and accurate regulation an control of band gaps and energy level arrangement are achieved. The donor-acceptor type fluorenyl nanometer grid material has potential application prospects in the fields of photoelectric function materials of organic solar cells, storage and memory resistor, sensing, detecting and the like.

The invention discloses a cross-linkable fluorobenzene-containing end-capped liquid crystal conjugated polymer based on benzodithiophene and double thiophene-substituted difluorobenzothiadiazole and an application thereof to a solar cell. The polymer is characterized by being shown as a structural formula in the specifications. The conjugated polymer disclosed by the invention has liquid crystal characteristic, and can be used for inducing, adjusting and controlling the ordered structure of an active layer and increasing hole mobility; the terminal group of the polymer is functionalized by using a fluorobenzene-containing end-capping agent, so that uniform dispersion between the polymer and PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) can be facilitated, the hole electron transmission rate of the active layer is increased, the device performance is enhanced effectively, and energy transformation efficiency is up to 7.6 percent; and due to the introduction of a cross-linkable unit, a cross-linked active layer material with a stable structure can be obtained, the stability of a device is enhanced, the service life of the device is prolonged, and the efficiency can still reach 7.3 percent 40 days later.

The invention discloses a polymer photovoltaic material, a preparation method and use thereof. The molecule of the polymer material takes two-dimensional conjugate dibenzothiophene or naphtho-bithiophene as a donor, and takes thiophene and pyrrole diketone and derivatives thereof as receptors, and the polymer material has a structure shown in a formula (I) or a formula (II). The polymer material is simple in preparation and easy to purify, and has good solubleness in common organic solvents (for example, dichloromethane, trichloromethane, tetrahydrofuran, chlorobenzene or o-dichlorobenzene and the like). The film with high quality can be prepared by using a liquid method. The macromolecule is applied to a donor material of a solar battery, the energy conversion efficiency exceeds 7.5%, and the open-circuit voltage exceeds 1V.

Objects of the present invention are to provide: a light-emitting element having a long lifetime and good emission efficiency and drive voltage. One embodiment of the invention is a light-emitting element including, between an anode and a cathode, at least a stack structure in which a first layer, a second layer, and a light-emitting layer are provided in order from the anode side. The first layer includes a first organic compound and an electron-accepting compound. The second layer includes a second organic compound having a HOMO level differing from the HOMO level of the first organic compound by from −0.2 eV to +0.2 eV. The light-emitting layer includes a third organic compound having a HOMO level differing from the HOMO level of the second organic compound by from −0.2 eV to +0.2 eV and a light-emitting substance having a hole-trapping property with respect to the third organic compound.

The invention discloses a fluorenyl donor / receptor type nano polymer as well as a preparation method and application thereof. In a nano grid polymer, a fluorenyl derivative is used as electron donor units in nano grid fragments, and the electron donor units and electron receptor units are arranged alternatively to form a square annular rigid structure. The preparation method comprises the following step: performing a polymerization reaction on a nano grid fragment (II) and a polymerization fragment (III) with preserved halogen end groups, thereby obtaining the polymer. The polymer material disclosed by the invention has the advantages that a synthesis mode is modularized, high extensibility and high thermal, electrochemical and optical stability can be achieved, film solvent dependency can be alleviated, large-scale soluble processing can be achieved, aperture sizes can be precisely adjusted and controlled, precise regulation and control on band gap and energy level arrangement can be achieved, and the like; and the polymer material has potential application prospects in fields of photoelectric functional materials for organic solar batteries, memories and memory resistors, sensors, detectors and the like.

The invention discloses a cathode injection material, and a manufacturing method and an application thereof. The cathode injection material comprises nano-titanium dioxide and a cesium salt doped mutually. The manufacturing method comprises the following steps of: preparing a nano-titanium dioxide solution and a cesium salt solution respectively; mixing a nano-titanium dioxide solution dispersion system with the cesium salt solution to obtain a mixed solution; and coating the mixed solution onto a conductive substrate in a spinning way, and heating and drying to obtain the cathode injection material. The cathode injection material disclosed by the invention has the advantages of low cost, capability of effectively enhancing the input and the transmission of charges, increase in the LUMO energy level of a cathode when applied to an organic electroluminescent device, matching with the energy level of an organic electroluminescent structure, reduction in a potential barrier between the cathode injection material and the organic electroluminescent structure, more suitability for electron injection, increase in the electron injection efficiency, preferable increase in the light extraction capability of the organic electroluminescent device, high luminance and long service life. The manufacturing method of the cathode injection material has a simple procedure and high production efficiency.

The invention discloses an organic electroluminescent compound and an organic electroluminescent device, wherein the structural formula of the organic electroluminescent compound is represented by thefollowing formula 1, m, n and p are the same or different, m, n and p are independently 0 or 1, m + n + p = 1, a benzene ring A and a benzene ring B are connected through a single bond or not througha single bond, Ar1, Ar2, Ar3, Ar4, Ar5 and Ar6 are represented by a formula 2, R is a substituted or unsubstituted C6-C60 aryl or substituted or unsubstituted C6-C60 heteroaryl, q is 0 or 1, and L isphenylene or naphthylene. According to the invention, with the application of the organic electroluminescent compound as a luminescent layer material to an organic electroluminescent device, the service life of the prepared organic electroluminescent device is prolonged to a great extent, so that the organic electroluminescent compound has a wide application prospect.

The invention relates to a conjugated small molecule based on nona fused heterocycle, a preparation method and applications thereof. According to the preparation method, 2,5-dibromoterephthalic acid diethyl ester is used as a raw material, and a series of coupling, ring forming, condensation and other reaction steps are performed to synthesize a small molecule having a large planar structure. According to the present invention, the A-D-A conjugated small molecule based on the nona fused heterocycle unit of pyrrolodithiophene has characteristics of good thermal stability, good solubility and good film forming property; the results of ultraviolet-visible light absorption spectrum and electrochemical tests show that the compound has moderate optical band gap, and has good absorption in visible and near-infrared regions; and the obtained product has low HOMO level and low LUMO level, and is the potential organic solar cell receptor material or perovskite battery electron transport layer material.

The invention discloses a ferric salt-doped Spiro-OMeTAD hole transport layer and a solar cell comprising the hole transport layer. The solar cell comprises a conductive substrate, an electron transport layer, a mesoporous layer, a perovskite layer, a FeCl<3>-doped Spiro-OMeTAD hole transport layer and a metal electrode from the bottom up in sequence. The hole transport layer is obtained by dropwise adding a FeCl<3> solution to an Spiro-OMeTAD solution, and performing spin coating on the perovskite layer with the mixed solution. By adopting FeCl<3> as a dopant to dope the Spiro-OMeTAD, the energy conversion efficiency of the perovskite solar cell can be greatly improved, and the efficiency of a device which adopts the hole transport material can reach 17.2%.

The invention discloses a benzoquinoxaline tetrafluoride compound, a benzoquinoxaline tetrafluoride based polymer as well as a preparation method and an application of the enzoquinoxaline tetrafluoride based polymer. The benzoquinoxaline tetrafluoride based polymer is prepared from a benzoquinoxaline tetrafluoride monomer and a benzodithiophene monomer through a Stille coupling reaction, wherein the side chain of the benzodithiophene monomer is alkylthiophene, alkoxyphenyl, fluoro alkoxyphenyl or phenyl sulfhydryl; the polymer has good solubility in common organic solvents such as dichloromethane, trichloromethane, tetrahydrofuran and the like, is processed into a film easily and has a good photovoltaic conversion function; the photovoltaic conversion efficiency of a prepared solar polymer device is higher than 7%, and the highest photovoltaic conversion efficiency of a single layer device is as high as 8.6%.

The invention discloses a two-dimensional conjugated BDF organic micro-molecular photovoltaic material, and a preparation method and an application thereof. Two-dimensional conjugated BDF organic micro-molecules with the structure represented by formula (I) are obtained by connecting a thiophene conjugate side chain-containing benzo[1,2-b;3,4-b]difuran (BDF) unit with another aryl heterocycle through a Stille coupling technology. The organic micro-molecular photovoltaic material has wide visible region absorption, suitable HOMO and LUMO energy levels and narrow band gap. Organic solar cells are produced by using the organic molecules as an electron donor and PC61BM as an electron receptor, the maximum energy conversion efficiency of the organic solar cells reaches up to 3.7%, and the organic solar cells have a good photoelectric conversion efficiency.

The invention belongs to the technical field of small organic molecule photoelectric materials, and discloses a high-performance hole transport material and a preparation method and application thereof. The structure of the hole transport material is shown as a formula I, and Ar1 and Ar2 are independently an unsubstituted or substituted carbazole unit, a fluorene unit, a dibenzopyran unit and a dibenzothiophene unit, and the substituted substituent group is alkyl, alkoxy or alkylthio with the carbon atom number of 1-6. The hole transport material provided by the invention has the advantages ofhigh glass transition temperature, low HOMO energy level and good hole mobility. The invention also discloses a preparation method of the hole transport material. The method is simple and low in cost. The hole transport material provided by the invention is used for preparing photoelectric devices, especially such as OLED devices and solar cell devices.

The invention discloses an IDT photovoltaic material and a preparation method and an application thereof and belongs to the technical field of photovoltaic materials. The material is shown in a formula (I). The invention also provides the preparation method and the application of the IDT photovoltaic material. The IDT photovoltaic material is prepared by the step of synthesizing an organic small molecule which contains an IDT electron donor unit and an organic electron donor unit of [2.1.3] benzoselenadiazole, the terminal group of which is difluorophenyl. The preparation method specifically comprises the step of connecting carbon-carbon single bonds with BSe units to obtain the IDT organic small molecular photovoltaic material. The small molecule which is applied to a solar battery has a good photovoltaic conversion efficiency. The formula is as shown in the description.

The invention relates to the technical field of organic electroluminescence, and especially relates to a compound, an organic light-emitting device and a display device. The compound has a structure represented by formula (I).

The invention discloses a lithium ion battery electrolyte containing an unsaturated bond silane additive, which comprises an electrolyte lithium salt, a non-aqueous organic solvent and a film-forming additive, and the film-forming additive comprises an unsaturated bond-containing silane additive with a structure shown in a formula (I). The invention further discloses a lithium ion battery. The lithium ion battery comprises a positive plate, an isolating membrane, a negative plate and the lithium ion battery electrolyte containing the unsaturated bond silane additive. According to the invention, the formula of the electrolyte is optimized, all the components have a synergistic effect, the advantages of the components can be exerted, the defects of the components can be mutually inhibited, and the cycle performance of the lithium ion battery and the capacity retention rate after high-temperature storage are remarkably improved.

The invention discloses a condensed ring quinoxaline imide non-fullerene acceptor material and a preparation method and application thereof. The condensed ring quinoxaline imide non-fullerene acceptormaterial comprises a condensed ring quinoxaline imide central core and electron deficiency end groups, the condensed ring quinoxaline imide central core is of a nitrogen bridge trapezoidal condensedring structure, and the electron withdrawing end groups are connected to the two ends of the central core. The acceptor material has good solubility and is easy to process into a film. An organic / polymer solar cell and an organic photodetector device which are prepared by taking the condensed ring quinoxaline imide non-fullerene acceptor material as an active layer show excellent performance, theenergy conversion efficiency of an organic photovoltaic cell is over 12 percent, and the dark current density of an organic photodetector is lower than 1mA / cm < 2 >; the non-fullerene acceptor material has a wide market prospect in organic photovoltaics, logic complementary circuits, organic photodetectors, organic field effect transistors and organic light emitting diodes.

The invention belongs to the technical field of a photoelectric material and application, and particularly relates to a polythiophene derivative photoelectric material, and a preparation method and application thereof. Through the material, the density of polythiophene derivative alkyl side chains is reduced; electron withdrawing groups are introduced for reducing the HOMO energy grade, so that the regulation and control on the polymer energy grade, the dissolution performance, the aggregation and the crystallinity can be realized through changing different reactant proportioning ratio. Compared with P3HT, the material has the advantages that the crystallinity is improved; the adsorption spectrum generates red shift to a certain degree. The structure is simple; different repeated units arerealized; the synthesis is easy; the material is suitable for large-area production. In addition, the polythiophene derivative has the high absorption coefficient (105cm<-1>); the absorption capability on the sun light is enhanced; the requirements of a high-efficiency device can be met; the polythiophene derivative photoelectric material can be applied to the field of photoelectric materials oforganic solar batteries, perovskite solar batteries, organic thin film transistor and the like. The formula is shown in description.

The invention relates to a bithiophene silicon pentalene-fluoroquinoxaline conjugated polymer which has a structural formula shown as a formula I. The polymer is prepared by subjecting 2,6-bi(trimethyltin)-4, 4-bi(2-ethylhexyl)-4-hydrogen-bithiophene[3,2-b,2',3'-d] pentane monomer serving as an electron supply unit and bibromide substituted fluoro-5,8-bithiophene quinoxaline monomer serving as an electron receiving unit to Stille coupling reaction and used for donor materials of polymer bulk heterojunction solar cells. Strong electron drawing group fluorine atoms are introduced on an electron deficiency quinoxaline, so that HOMO energy level of materials can be effectively lowered to increase open-circuit voltage of polymer photovoltaic cells.

The invention discloses a thickened triphenyl compound as well as a preparation method and application thereof. The thickened triphenyl compound has a structure shown as a formula (I). The parent nucleus of the thickened triphenyl compound is thickened triphenyl. Since the three benzene rings are non-coplanar, the thermal stability of molecules is improved. In addition, the non-coplanar structureof the thickened triphenyl can avoid molecular stacking, exciton generation is facilitated, and the luminous efficiency of the material is improved. By setting R1 and R2 substituent groups, the compound shown as the formula (I) has high overall structural rigidity, the thermal stability of the molecules can be improved, and the service life of the material is prolonged. The invention furthermore discloses an organic electroluminescence device. At least one functional layer contains the previous thickened triphenyl compound. The thickened triphenyl compound serves as a host material or a guestmaterial of the luminescent layer, the stability is high, and the luminous efficiency of the device is high.

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to an organic compound and application thereof. The compound disclosed by the invention has apyridine or pyridine derivative substituted triarylamine structure; the triarylamine structure has very high migration efficiency on holes; meanwhile, the pyridine or pyridine derivative substituted compound can properly reduce the HOMO energy level of the compound and improve the turn-on voltage under low brightness, and plays an important role in voltage collocation of red, green and blue devices. The compound can maintain good thermodynamic stability and has a good effect on prolonging the service lifetime of materials. The compound is suitable for use as a hole transport layer in OLED devices.

The invention belongs to the field of functional polymer materials, and particularly relates to a conjugated polymer of 4,8-diisooctane alkoxy phenyl [1,2-b;3,4-b] bithiophene and fluorinated quinoxaline, the structural formula of which is shown by I. The polymer is prepared by the Stille coupling reaction of double bromide fluorinated quinoxaline and a 2,6-bis(trimethyltin)-4,8-diisooctane alkoxy phenyl [1,2-b;3,4-b] bithiophene reagent and is used for electron donor materials of polymer bulk heterojunction photovoltaic cells. The polymer disclosed by the invention introduces strong electron-withdrawing fluorine atom to the electron-deficient unit quinoxaline, thus effectively reducing the HOMO energy level of materials and enhancing the open circuit voltage of polymer solar cells.

The invention provides a polymer, a preparation method thereof and an organic polymer solar battery. The polymer is shown in a formula (I) or a formula (II). Compared with an existing conjugated polymer, the polymer which is shown in the formula (I) or the formula (II) has the advantages that a condensed ring unit of dithieno carbazole serves as a donor and is low in reorganization energy and good in pi electron delocalization; by introducing the condensed ring unit into a conjugated compound, the reorganization energy of the polymer can be effectively reduced, and the conjugation length of the polymer is increased, so that the mobility of the polymer can be improved, and an optical band gap of the polymer is reduced; the optical band gap is reduced to cause the red shift of an absorption band of the polymer, and absorption spectra are matched with solar spectra. Therefore, by the adoption of the polymer, the spectrum absorption range of the polymer can be expanded, and the hole mobility can be improved; fluoro-isoindigo serves as a receptor, so that the highest occupied molecular orbital (HOMO) energy level of the polymer can be reduced, and the open-circuit voltage of the polymer solar battery is improved.

The invention provides a donor-acceptor-donor-acceptor-donor oligothiophene derivative taking dithienopyrrole as a molecular center. The chemical structural formula of the derivative is shown in formula I in the description, synthesis comprises the steps that 2,6-di(trimethyl-tin)-N-iso-octane-dithieno[3,2-b:2',3'-d]pyrrole and 4,7-dibromine-[1,2,5]thiadiazole[3,4-c]pyridine react to synthesize an intermediate (2,6-2{(4-(7-bromine-[1,2,5]thiadiazole[3,4-c]pyridine)}-N-iso-octane-dithieno[3,2-b:2',3'-d]pyrrole); and then the (2,6-2{(4-(7-bromine-[1,2,5]thiadiazole[3,4-c]pyridine)}-N-iso-octane-dithieno[3,2-b:2',3'-d]pyrrole) reacts with 2-(trimethyl-tin)-5-(4-n-hexylphenyl)thiophene to obtain the target oligothiophene derivative. The oligothiophene derivative has a narrow band gap, a lowHOMO energy level, good solubility and film formation, and is expected to be used as an organic semiconductor material in the preparation of organic thin film field effect transistors, organic light emitting diodes and organic solar cell devices.

The invention discloses a green phosphorescent host material with excellent performance and an organic electroluminescent device. The structural formula of the material is shown in the specification.Compared with a contrast example, the organic electroluminescent device prepared from the green phosphorescent host material with excellent performance has the advantages that: the voltage is greatlyreduced, and the luminous efficiency is remarkably improved. Therefore, the compound provided by the invention can greatly reduce the driving voltage of the device, greatly reduces the consumption ofelectric energy, and remarkably improves the luminous efficiency. In addition, by reducing the driving voltage, the service life of the organic electroluminescent device is remarkably prolonged.

The invention discloses an fPP (fluoropyridine [3,4-b] pyrazine) compound, a fPP-based copolymer material and an application of the fPP-based copolymer material. The fPP-based copolymer material is prepared from the fPP compound, benzodithiophene containing an alkylthrophene or alkylthio-throphene side chain as well as other components through Stille coupling, has good solubility, is processed into a film easily and has a good photoelectric conversion function, when the material is used for preparing organic solar cell devices, the photoelectric conversion efficiency all exceeds 5%, and the highest photoelectric conversion efficiency of single layer device is as high as 6.2%.

The invention belongs to the field of organic small molecule solar cells, and particularly relates to a D(pi-A)2 type small molecule donor material based on a pyrazine indole terminal electron acceptor and a preparation method and application thereof. An electron donating (D) unit of the D(pi-A)2 type small molecule is 3, 6-bis-(octylthio) thienothiophene (TT), a pi bridge unit is alkylated, oxyalkylated or thioalkylated thiophene or selenophene, an electron withdrawing (A) unit is a novel pyrazine indole derivative, and the small molecule donor material is applied to a solution processing type small molecule solar cell. PC71BM is used as a receptor, and the energy conversion efficiency of the bulk heterojunction solar cell reaches 7.31%. According to the invention, high-efficiency energyconversion of a small molecular donor material constructed based on a pyrazine indole derivative terminal receptor unit in a small molecular solar cell is realized.