165results about How to "Reduce the lighting voltage" patented technology

The invention relates to an organic light emitting diode with a double-layer electron transport layer and a preparation method thereof. The preparation method is characterized in that the double-layer electron transport layer is prepared by a solution method, namely, an ultra-thin acetylacetonate metal salt film is deposited on a light emitting layer of the device by the solution method first, and then a zinc oxide nano particle film is deposited on the ultra-thin acetylacetonate metal salt film by the solution method, thus realizing preparation of the double-layer electron transport layer through a full solution method. By adopting the method to prepare the electron transport layer of the organic light emitting diode, injection and transport of electrons in the device can be improved, charge transfer between the light emitting layer and the zinc oxide layer can be effectively inhibited, the device is enabled to get light emitting efficiency a hundred times higher than that of a conventional device, and the device has lower driving voltage and higher brightness. The method of the invention is widely used in the field of organic light emitting devices.

The invention relates to an organic electroluminescent device which utilizes a high-conductivity hole-transporting material as the hole-transporting layer. The hole-transporting layer of the high-conductivity hole-transporting material is formed by doping an organic main body material and high-conductivity metal oxide. The metal oxide doped with a hole-filling transporting layer of the organic main body has very high conductivity, and the conductivity is between 10<-10> to 10<-6>s / cm; the electroluminescent device has the advantages of low turn-on voltage and high efficiency, the turn-on voltage is between 2.5-2.8 volts, the maximum current efficiency is 15.4-18.5 candelas / ampere (cd / A), and the maximum power efficiency is between 14.1-21.4 lumens / watt (lm / W).

The invention relates to the field of fluorescence carbon nanomaterials, in particular to a high-quantum-yield eigenstate-fluorescence-adjustable carbon dot and a preparing method and application thereof. Diaminonaphthalene or a hydroxyl, carboxyl, methyl, ethyl, N,N-dimethyl and N,N-diethyl substituted ramification of the diaminonaphthalene and citric acid serve as carbon source precursors, an eigenstate fluorescence carbon dot solution can be obtained through a solvothermal method. The prepared eigenstate fluorescence carbon dot has the beneficial effects of being high in crystallization, high in surface passivation degree, even in nitrogen doping, even in size distribution and the like, and has the wide application prospect.

The invention relates to an organic electroluminescent material and an application thereof. The electroluminescent material has a molecular structure as shown in a formula (I), has relatively good thin film stability and suitable molecular energy level, can serve as a hole-transport material, and is applied to the field of organic electroluminescent.

The invention relates to the technical field of organic light emitting, in particular to a light-emitting device. The light-emitting device comprises a first electrode, a second electrode and at least one light-emitting layer, wherein the light-emitting layer is arranged between the first electrode and the second electrode and includes at least one main body material, at least one auxiliary material and at least one heat delay fluorescent material, the at least one main body material is used for transmitting electrons, the at least one assistant material is used for transmitting holes, the at least one thermal delay fluorescent material is used for an object to emit light, and the main body material and the auxiliary material form a radical complex during the light-emitting process. By the light-emitting device, an exciton energy transfer path is increased, energy in excitons is fully utilized, and the light-emitting efficiency of the light-emitting device is improved; and meanwhile, electron injection and hole injection become easier, the starting voltage is reduced, and a phenomenon efficiency roll-off is improved.

The invention provides an organic light emitting device and a preparation method thereof. The organic light emitting device comprises a substrate, a first electrode layer positioned on the surface of the substrate, a functional layer positioned on the first electrode layer, and a second electrode layer formed on the functional layer. The functional layer comprises at least the first two of an electron transport material, a hole transport material, a fluorescent dye and a phosphorescent dye. Deposition rates of the electron transport material and the hole transport material change in a gradient mode. By the organic light emitting device and the preparation method thereof, the stability of the device can be improved, a preparation process and a preparation flow of the device are simplified, the efficiency of the device is improved, and the service life of the device is prolonged.

The invention belongs to the technical field of electroluminescent materials, and discloses an organic semiconductor material and a luminescent device. The organic semiconductor material comprises atleast one substrate material and at least one doping material. The substrate materials are provided with structures shown as a general formula (I), and the doping materials are provided with structures shown as a general formula (II) or a general formula (III). The organic semiconductor material and the luminescent device have the advantages that lightening voltages of the luminescent device prepared from the organic semiconductor material can be obviously lowered, and the luminescent efficiency of the luminescent device can be obviously improved; the efficiency of the organic semiconductor material for deep blue phosphorescent devices can be obviously improved, and accordingly application of the organic semiconductor material to sky blue phosphorescent devices, green phosphorescent devices and red phosphorescent devices can be anticipated according to energy transfer principles.

The invention provides an acridine D-A type thermal activation delayed fluorescent material. The acridine D-A type thermal activation delayed fluorescent material contains similar electron-donating group acridine, the integrated structure of the material is changed by introducing different electron-withdrawing groups such as a benzene ring, fluorine, carbazole and sulphone, light emission with high purity and multiple colors, particularly blue color is realized, and the problems of shortage of the existing blue light thermal activation delayed fluorescent material and bad performance are solved. The material is novel in structure, has excellent performance, can be synthesized through Ullmann coupling reaction, is simple in synthesis method and high in yield, can serve as a light-emitting layer material in an organic electroluminescent device, has high light-emitting efficiency and low efficiency roll-off, and can effectively reduce lighting voltage.

The invention provides an organic compound and an electroluminescent material and applications thereof; the organic compound has a structure represented by a formula I, by designing a spiro parent nucleus structure and introducing a specific substituent, material stacking can be prevented, and the crystallinity of molecules can be reduced; due to the design of the spiro structure and a substituentgroup, the organic compound has a high triplet state energy level T1, and due to a nitrogen heterocyclic ring and a connecting group thereof, the organic compound has relatively good electron transport and hole transport characteristics; HOMO and LUMO energy levels are appropriate, so that energy level matching with adjacent layers is facilitated; the glass transition temperature is high, and themolecular thermal stability is good; the light-emitting efficiency and the service life of the device can be effectively improved. The organic compound can be used as an electroluminescent material for a light-emitting layer, a hole blocking layer or an electron blocking layer of an OLED device, is especially suitable for being used as a phosphorescent host material to be applied in the light-emitting layer, and can significantly improve the light-emitting performance of the device and prolong the service life of the device.

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to an organic light-emitting material and applications thereof. According to the invention, the organic light-emitting material has an indolocarbazole parent structure, has high interatomic bond energy and good thermal stability, and is beneficial to intermolecular solid-state accumulation; the preparation process of the derivative has characteristics of simpleness, easy performing and easily available raw materials, and is suitable for mass production and amplification; with the application of the arylamine-substituted indolo heterocyclic derivative in the light-emitting layer of an organic electroluminescent device, the proper energy level with the adjacent level is achieved, the holes and the electrons are easily injected, the turn-on voltage can be effectively reduced, the high exciton migration rate is achieved, and the device can achieve good light-emitting efficiency; and the compound has large conjugate plane, is beneficial to molecular accumulation, shows good thermodynamic stability, and shows long service life as the light-emitting layer material in an organic electroluminescent device.

The invention belongs to the field of organic electroluminescent materials and particularly relates to a novel thermal-activated-delayed-fluorescence luminescent material and an application thereof. The material is characterized by comprising a structure represented by a formula (1) shown in the description, wherein R1 and R2 each is any one independently selected from a group consisting of a hydrogen atom, a C3-C30 substituted or unsubstituted carbazolyl group, a C3-C30 substituted or unsubstituted arylamine group, a C3-C30 substituted or unsubstituted phenothiazine group, a C3-C30 substituted or unsubstituted phenoxazine group, a C3-C30 substituted or unsubstituted phenazine group and a C3-C30 substituted or unsubstituted acridine group, and R1 and R2 are not hydrogen simultaneously; and R3 is any one selected from a group consisting of hydrogen and C1-C10aliphatic straight-chain or branched-chain alkane. The material provided by the invention is stable in property, has good luminescent performance and is applied to organic electroluminescent devices as a luminescent material.

The invention relates to an organic electroluminescent material and a preparation method thereof and an organic electroluminescent device. According to the organic electroluminescent material, a benzo[g] bending structure is adopted as the center, a first benzene ring is introduced into the site g of the benzo[g] bending structure, then a second benzene ring is used for replacing hydrogen groups on the first benzene ring, a nitrogen heterocyclic ring is used for replacing hydrogen groups on the second benzene ring, and the following structure shown in the description is achieved, wherein Ar is a nitrogen heterocyclic ring with the electron transport function. Compared with the prior art, the organic electroluminescent material has a very proper triplet state energy level, high glass-transition temperature, good heat stability and high carrier transport capacity, the preparation method is simple, operation is easy, the yield is high, and cost is low; the organic electroluminescent material serves as a main material to replace CBP to manufacture the organic electroluminescent device, lower turn-on voltage and higher maximum current efficiency are achieved, the turn-on voltage can be reduced by 0.5-1.1 V, and the maximum current efficiency can be improved by 18% to 24%.

The invention discloses a compound with an aza-spirofluorene structure as a mother nucleus and an application of the compound on organic electroluminescent devices. According to the compound, the aza-spirofluorene structure is used as a nucleus, and the compound has the characteristics of difficult crystallization and difficult gathering among molecules and excellent film-forming property. When the compound is used as a luminescent layer material or an electron barrier layer material of an organic electroluminescent device, current efficiency of the device is greatly improved; and meanwhile, the service life of the device is remarkably improved.

The invention discloses a multi-functional modified phenyl ether single phosphine oxide main material, a synthetic method and an application thereof, relates to an organic electroluminescence material, preparation and application thereof and solves the problems of low luminous efficiency and brightness of existing organic electroluminescence materials and contradiction between high triplet state excited state energy level and good carrier injection / transmitting capacity. The preparing method of parent structure of the multi-functional modified phenyl ether single phosphine oxide main material includes adding N-bromo-succinimide in 2-diphenyl phosphine oxide phenylate to perform bromination reaction; and introducing a functional group with a carrier transmission characteristic to perform a substitution reaction, and extraction, drying and column chromatography are performed to obtain the multi-functional modified phenyl ether single phosphine oxide main material. The multi-functional modified phenyl ether single phosphine oxide main material has the advantages that the voltage of lightening an electrophosphorescent device is reduced, the luminous efficiency and brightness of the organic electroluminescence material are improved, and the material is mainly used for an organic electrophosphorescent diode device.

The invention provides a novel organic light-emitting material. The novel organic light-emitting material is used for a light-emitting main body material and an electron transport layer material of anorganic light-emitting device. The invention also provides an organic light-emitting device comprising the novel organic light-emitting material.

The invention provides dihydro acridine derivatives, application thereof and an organic electroluminescent device applying the same. The diphenyl phosphine oxide substituted dihydro acridine derivatives have a structural formula shown in the formula (1) in the specification and are used as phosphorescence main material in an organic electroluminescent device. The an organic electroluminescent device applying the compounds has higher current efficiency, and start voltage is reduced effectively.

The invention belongs to the field of organic electroluminescence materials, and particularly relates to an organic electroluminescence material comprising a 4,5-diazaspiro thioxanthone structure, application of the organic electroluminescence material, and a device; the organic electroluminescence material can be used for OLEDs (Organic Light Emitting Diodes), has very good bipolar transmission property and can be used as a main material. A structural formula is as shown in the description, wherein Ar1 and Ar2 are independently selected from hydrogen atoms, substitutive or non-substitutive carbazole groups of C3 to C30, substitutive or non-substitutive arylamine groups of C3 to C30, substitutive or non-substitutive phenothiazine groups of C3 to C30, substitutive or non-substitutive phenoxazine groups of C3 to C30, substitutive or non-substitutive phenazine groups of C3 to C30 and substitutive or non-substitutive acridine groups of C3 to C30, and Ar1 and Ar2 are not hydrogen at the same time. The invention also relates to the device comprising at least one layer of bipolar compound as a main body, and a method for manufacturing the device.

The invention discloses a six-arm stellate organic light-emitting material and an organic electroluminescent device adopting the material. The structure of the six-arm stellate organic light-emitting material is shown by a formula (I), six-arm isotropic molecules ordered in height and of three-dimensional structures are formed by utilizing a P-type group with carbazole as a representative, connecting N-para C atoms with trimerized carbazole and then using Sp3 hybridized N atoms as linkage to connect a N-type group with dicyanobenzene as a representative, the advantage of a specific micromolecular structure is kept by utilizing an alkyl chain or and alkoxy chain for solubilization promotion, and the compound also has good branch and polymer solubleness and wettability and facilitates solution processing for film formation. A light-emitting layer of the organic electroluminescent device is made by adopting ink-jet printing, the six-arm stellate organic light-emitting material serves as a main light-emitting material or an object doped material to be applied to the light-emitting layer of the organic electroluminescent device, and pure red light emission is obtained.

The invention relates to an organic electroluminescent material, a preparation method and applications thereof. The material is an organic micromolecular material, which takes 1,5-naphthyridine as the center and has a parallel ring structure, and the structure of the material is represented in the description. In the structural formula, the Ar1 and Ar2 individually represent an aromatic ring with / without a substituent or an aromatic heterocyclic ring with / without a substituent, and further represent a benzene ring, naphthalene ring, pyridine, [1,8]naphthyridine, pyrimidine or triazine with / without a substituent, wherein the Ar1 and Ar2 can be same or different. The provided material has a proper molecular energy level and high glass-transition temperature, so the material can be used as a phosphorescent main material and can be used to prepare the functional layer and especially the luminescent layer of an organic electroluminescent device in the organic electroluminescent field.

The invention discloses a dibenzofuranyl aromatic phosporic-oxygenic compound and a preparation method and application thereof, relating to the dibenzofuranyl aromatic phosporic-oxygenic compound and the preparation method and the application thereof. The problems of low luminous efficiency and brightness and poor stability of an electrophosphorescent device, caused by serious concentration quenching and a triplet annihilation effect existing in the traditional electrophosphorescent material, are solved. In a general structural formula of the compound, X represents H or diphenyl phosporic-oxygenic group. The preparation method comprises the following steps of: preparing a derivative by using dibenzofuran, butyl lithium, tetramethylethylenediamine and diphenylphosphine chloride; dissolving the derivative in CH2CI2; adding H2O2; reacting; and thus obtaining the compound. In the application of an organic electrophosphorescent device, the compound is used as a main material of a luminescent layer. The diphenyl phosporic-oxygenic group is modified on a chromophore patent body through a C-P saturated bond to prepare electro blue / electro white / electro green main materials which are high in triplet excited state energy level and have good carrier injection and transmission capacity, and the prepared device has extremely low driving voltage, excellent brightness and stable efficiency.

The invention discloses an organic electroluminescence device. The organic electroluminescence device comprises a substrate, a first electrode, a hole injection layer, a hole transmission layer, an organic light emitting layer, an electron transmission layer, an electron injection layer and a second electrode, wherein the substrate, the first electrode, the hole injection layer, the hole transmission layer, the organic light emitting layer, the electron transmission layer, the electron injection layer and the second electrode are sequentially stacked. The hole injection layer comprises two thin inorganic nano-rod films which are vertically stacked. The inclination angles of inorganic nano-rods of the thin inorganic nano-rod film at the side close to the substrate are smaller than the inclination angles of inorganic nano-rods of the thin inorganic nano-rod film at the side far away from the substrate. The thin inorganic nano-rod film with the smaller inclination angles is beneficial to the increase of the effective contact area between the hole injection layer and an adjacent electrode layer, the barrier height, from an anode to the hole injection layer, of a hole is effectively reduced, and the starting voltage and the working voltage are reduced. The thin inorganic nano-rod film with the larger inclination angles can effectively adjust the balance of electrons and the hole, the gap scattering property of the inclined nano-rods is used, so that on the premise that power efficiency is not sacrificed, the luminous efficiency is improved. The invention further discloses a preparing method of the organic electroluminescence device.

The invention provides an organic compound, and an electron transport material and applications thereof, wherein the organic compound has a structure represented by a formula I. According to the invention, through the special design of a molecular structure and a substituent group, tridentate coordination or tetradentate coordination can be generated between the organic compound and a metal, so that the organic compound can be stably and firmly combined with the metal, the organic compound has high stability and long service life when being used as an electron transmission material, and the problem of drift voltage rise is effectively improved; the organic compound has large rigid distortion, so that the increase of intermolecular attraction can be inhibited, and the excessive intermolecular attraction caused by formation of a planar structure can be avoided; and the organic compound used as an electron transport material can be applied to an electron transport layer and / or an electroninjection layer of an OLED device, so that the luminous efficiency of the device can be effectively improved, the service life of the device can be effectively prolonged, and the turn-on voltage canbe reduced.

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to naphtha-five-membered ring-benzofused heterocycle organic compounds and application thereof. The organic compounds disclosed by the invention have a parent structure of naphtho-five-membered ring-benzofused heterocycle, are high in interatomic bond energy, present good thermal stability, are beneficial for intermolecular solid accumulation, and can be used as luminescent layer materials to effectively prolong the service life of materials. The compounds provided by the invention are derivatives of large conjugated fused heterocycles, are applied to light emitting layers, have proper energy levels matched with adjacent layers, facilitate injection of holes and electrons, can effectively reduce turn-on voltage, and can realize good light emitting efficiency in a device due to a relatively high exciton migration rate. The compounds disclosed by the invention have relatively large conjugate planes, are beneficial for molecular accumulation, show good thermodynamic stability and present long service life in devices. A preparation process of the derivatives is simple and feasible,raw materials are easy to obtain, and the derivatives are suitable for large-scale production.

The invention discloses a multifunctional modified tert-butyl carbazole phosphine oxide main material and a synthesis method and an application thereof, and relates to an organic electroluminescent material and a synthesis method and an application thereof, which are used for solving the problem that the turn-on voltage of an electroluminescent device applied to an organic electroluminescent main material is on the high side. Six kinds of main materials are available; in 2 kinds of main materials, one or two phosphine oxide functional groups with carrier transmission characteristic are introduced to a tert-butyl carbazole parent respectively; and in the other 4 kinds of main materials, one, two or three phosphine oxide functional groups with carrier transmission characteristic are introduced to a 9-phenyl tert-butyl carbazole parent respectively. The tert-butyl carbazole is used as the parent of the main material; since the diphenylphosphine oxide matrix structure has the conjugation breaking effect of the P=O group, the parent has relatively high triple-stage energy level, as well as certain electron injection and transmission capacity, and the luminous efficiency and brightness of a luminous device are improved after the parent is applied to the luminous device; and meanwhile, the turn-on voltage can be reduced to 2.4V.

The invention belongs to the field of organic electroluminescence, and specifically relates to a bipolar host organic electroluminescent material and an application thereof. The bipolar host organic electroluminescent material provided by the invention has high current carrier injection and transport capabilities and good hole and electron transporting bipolar characteristic, so an organic electroluminescent device prepared by using the bipolar host organic electroluminescent material provided by the invention has the advantages of low starting voltage, high luminous efficiency, etc.; the bipolar host organic electroluminescent material has large molecular weight, high glass transition temperature and thermal decomposition temperature and high compound stability, and is favorable for significantly improving the service life of a device; the bipolar host organic electroluminescent material has high singlet and triplet energy levels and can be preferably used as a green light host material; and the device prepared by using the bipolar host organic electroluminescent material provided by the invention as a host material can effectively improve external quantum efficiency, power efficiency and current efficiency.

The invention provides a novel organic light-emitting material which has a structure as shown in a general formula (I) and can be used for an organic light-emitting device and an electron transport layer material. The invention also provides the organic light-emitting device which comprises the novel organic light-emitting material provided by the invention. The organic light-emitting material disclosed by the invention has a parent structure of indolocarbazole, high interatomic bond energy and good thermal stability, is beneficial for intermolecular solid accumulation, and has effectively prolonged service life when used as a light-emitting layer material. Meanwhile, a preparation process of the material is simple and feasible, raw materials are easily available, and the process is suitable for industrial production.

The invention discloses a fluorinated triphenylamine electro-material and an application thereof; according to the material, through the change of the positions and the numbers of hole transporting moieties of strong electron-withdrawing groups of fluorine or trifluoromethyl at periphery of triphenylamine, the energy of the highest occupied molecular orbital, the energy of the lowest unoccupied molecular orbital, the charge transport capacity, photophysical properties and thermal properties of the material are adjusted; thus balance between the injection and transport of holes and electrons is reached; most holes and electrons of the injected device are combined in a luminescent layer; therefore, the device structure is greatly simplified, and the device performance is improved. Meanwhile, through the modification of fluorine or trifluoromethyl, the luminescence property for blue and violet light of the material quite approaches the blue light chromaticity coordinate (CIE=(0.14, 0.08)) of the International Commission of Illumination (NTSC) the material also has a narrow spectrum full width at half maximum (FWHM); devices prepared by the material can not only effectively reduce device energy consumption, but also adjust the illuminant color of the device through radiation or energy transfer between a subject and an object.

The invention discloses a fluorine-substituted 9,9'-dianthracene blue light emitting host material and its application. The position and the number of a peripheral strong electrophilic group fluoro or trifluoromethyl are changed to realize a high fluorescence quantum efficiency and a good luminescence peak blue shift, and realize dark blue light emission by cooperating with an appropriate host (CBP); and the position and the number of the peripheral strong electrophilic group fluoro or trifluoromethyl are changed to make the material have an appropriate highest occupied molecular orbital and a lowest unoccupied orbital energy and realize good overlapping of the emission spectrum and the absorption spectrum of an object DPAVBi, so energy can be effectively absorbed and transferred to the object, thereby the luminescence of the object is caused, and the performances of a device are improved. The material has the advantages of good heat stability, good luminescence performance, easy synthesis and convenient purification, and can be widely used in the fields of organic field effect transistors, organic electroluminescent devices, the organic lasers and organic photovoltaic solar batteries.

This invention is related to a green light diode with interpenetrating alternate structure and manufacturing method. The diode adopts the design of interpenetrating alternate structure. A conductive glass anode layer is a dual-plane layer. A cavity transmission layer is a single plane+ a convex groove layer. A luminous layer is a recess+ a convex groove layer. A cathode is a single plane+ a convex groove layer. Each convex groove is correspondingly matched with the recess and interpenetrated and alternated so that a structure of plane+ convex layer+ plane layer is formed. The interpenetrating alternate structure is capable of extending a current carrier complex interface and a contact interface of metal cathode layer, improving the electronic injection, reducing the generation of positive ion and increasing the complex ratio of the current carrier. A convex-concave film is film-formed by mutually displacing main and secondary mask plates. An evaporation material is converted into a film layer from a solidity-gaseity-solidity in a vacuum evaporation furnace under the condition that the vacuum degree is not greater than 0.002 Pa and the temperature is 50 degrees Celsius. This method has short technical process, and the luminous efficiency of the component can be improved about 70%; the low voltage for lightening is 2.7V; the good color purity of green light is 0.4829; the color coordinate is that X is 0.2707 and Y is 0.5267. This invention supplies a gap of scientific research of this structure, such as the light emitting diode.